# Toolfyra — full tool reference
> Complete details for all 151 free browser tools at https://toolfyra.vercel.app. Each entry: what it does, how to use it, and FAQ answers. Update: 2026-08-28.
## Age Calculator
URL: https://toolfyra.vercel.app/age-calculator.html
Category: Calculators
Free age calculator: find your exact age in years, months and days from your date of birth — plus total days, weeks and your next birthday countdown. No signup.
An age calculator converts a date of birth into an exact age in years, months and days. This is useful for government forms, school and job applications, visa documents and medical forms where an exact age is required. The calculation accounts for different month lengths and leap years. Everything runs locally in your browser.
Q: How do I calculate my exact age?
A: Enter your date of birth and the 'as of' date. The tool computes full years, remaining months and remaining days, adjusting for month lengths and leap years.
Q: Is my date of birth stored anywhere?
A: No. The calculation happens entirely in your browser — nothing is sent to any server.
Q: Why do I need exact age in years, months and days?
A: Many government, exam and immigration forms ask for exact age, not just the year. This tool gives you the precise breakdown.
## Percentage Calculator
URL: https://toolfyra.vercel.app/percentage-calculator.html
Category: Calculators
Free percentage calculator: what is X% of Y, X is what percent of Y, and percentage increase or decrease. Instant results, mobile friendly.
A percentage calculator solves the three most common percentage problems: finding a percentage of a number, finding what percentage one number is of another, and calculating percentage increase or decrease between two values. Useful for discounts, taxes, grades, tips, finance and data analysis.
Q: How do I calculate X% of Y?
A: Multiply Y by X and divide by 100 — or just use the first mode of this calculator.
Q: How do I calculate percentage change?
A: Subtract the old value from the new value, divide by the old value and multiply by 100. Mode 3 does it automatically.
Q: Is it free?
A: Yes — 100% free, no signup, and all math runs in your browser.
## EMI / Loan Calculator
URL: https://toolfyra.vercel.app/emi-calculator.html
Category: Calculators
Free EMI calculator: compute monthly loan payments, total interest and total repayment for home, car or personal loans. Instant and private.
An EMI (Equated Monthly Instalment) calculator shows the fixed monthly payment for a loan based on principal, annual interest rate and tenure. The formula is P × r × (1+r)^n ÷ ((1+r)^n − 1), where r is the monthly rate. Comparing EMIs before borrowing helps you budget and negotiate better terms.
Q: What formula does an EMI calculator use?
A: EMI = P × r × (1+r)^n / ((1+r)^n − 1), where P is principal, r is monthly interest rate and n is number of months.
Q: Does a longer tenure reduce my cost?
A: It reduces the monthly EMI but increases total interest paid. Try different tenures above to compare.
Q: Is this the same as my bank's number?
A: It is the standard reducing-balance EMI formula used by banks. Small differences can come from processing fees or insurance add-ons.
## BMI Calculator
URL: https://toolfyra.vercel.app/bmi-calculator.html
Category: Calculators
Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy weight category instantly. Private — runs in your browser.
Body Mass Index (BMI) estimates body fat using weight and height: weight (kg) ÷ height² (m²), or 703 × lb ÷ in². The WHO categories are: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese. BMI is a screening tool, not a diagnosis — athletes and older adults may need other measures.
Q: What is a healthy BMI?
A: 18.5 to 24.9 is considered the healthy range for most adults.
Q: Is BMI accurate for everyone?
A: It is a general screening tool. It can misclassify muscular athletes and is not used for children (who use age-and-sex percentiles).
Q: Is my data saved?
A: No. Everything is calculated on your device.
## Word Counter
URL: https://toolfyra.vercel.app/word-counter.html
Category: Text Tools
Free word counter: live count of words, characters (with and without spaces), sentences, paragraphs and reading time. Perfect for essays and SEO.
A word counter helps writers, students and SEO professionals meet length requirements. This tool shows words, characters (with and without spaces), sentences, paragraphs, estimated reading time (200 wpm) and speaking time (130 wpm). All analysis is instant and stays on your device.
Q: How is reading time calculated?
A: Reading time uses an average of 200 words per minute; speaking time uses 130 words per minute.
Q: Does it count characters without spaces?
A: Yes — you get characters with spaces and characters without spaces.
Q: Is there a length limit?
A: No practical limit — it handles books worth of text smoothly.
## Case Converter
URL: https://toolfyra.vercel.app/case-converter.html
Category: Text Tools
Free case converter: switch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case. One click, copy ready.
A case converter transforms text between letter cases: UPPERCASE for headlines, lowercase for cleanup, Title Case for titles, Sentence case for paragraphs, plus programmer cases (camelCase, snake_case, kebab-case, CONSTANT_CASE) for code and URLs. Fix accidentally-caps-lock text in seconds.
Q: What is Title Case?
A: Every major word starts with a capital letter — used in headlines and titles.
Q: What is kebab-case?
A: All lowercase words joined by hyphens, e.g. my-page-url — common for URLs and file names.
Q: Can I convert back and forth?
A: Yes — just click any case button again on the new text.
## Text Toolkit
URL: https://toolfyra.vercel.app/text-toolkit.html
Category: Text Tools
Free text toolkit: remove duplicate lines, sort, trim, remove empty lines, number lines, extract & validate emails and IP addresses. All in your browser.
The text toolkit bundles everyday list and text operations: remove duplicate lines, remove empty lines, sort alphabetically, trim whitespace, number lines and reverse order. It can also extract email addresses and IPv4 addresses from any text and validate their format — handy for cleaning mailing lists, logs and datasets without spreadsheets.
Q: Does removing duplicates keep the first occurrence?
A: Yes — the first occurrence stays and later duplicates are removed.
Q: How does email validation work?
A: Each extracted address is checked against standard email format rules (name@domain.tld). It checks format, not whether the inbox exists.
Q: Is my text uploaded?
A: No — all processing happens locally in your browser.
## Password Generator
URL: https://toolfyra.vercel.app/password-generator.html
Category: Generators
Free strong password generator: create random passwords up to 64 characters with letters, numbers and symbols. Cryptographically secure, works offline.
Strong passwords should be long (14+ characters) and mix uppercase, lowercase, digits and symbols. This generator uses your browser's cryptographic random number generator (crypto.getRandomValues), which is far stronger than Math.random(). Generate, check the entropy estimate, and copy — the password never leaves your device.
Q: How long should my password be?
A: 16+ characters for important accounts; 64 is overkill but harmless. Length matters more than symbol soup.
Q: Is this password generator safe?
A: It uses crypto.getRandomValues in your browser — the password is never transmitted or stored.
Q: What is entropy?
A: Entropy (bits) measures guessing difficulty. 80+ bits is very strong; this tool shows the estimate live.
## QR Code Generator
URL: https://toolfyra.vercel.app/qr-code-generator.html
Category: Generators
Free QR code generator: turn links, text, WiFi or contact info into a downloadable QR code PNG. Choose size and error correction. Private and instant.
QR codes store links, text, WiFi credentials or contact details that phones can scan instantly. This generator creates static QR codes locally in your browser with adjustable size and error-correction level (higher correction survives logos and damage). The code never expires because it encodes your data directly — no redirect service involved.
Q: Do these QR codes expire?
A: No — the data is encoded directly in the image, so it works forever with no third-party service.
Q: What size should I choose?
A: 512px is fine for screens; 1024px+ for print.
Q: What does error correction do?
A: Higher levels (Q/H) let the code scan even if up to 30% is damaged or covered — useful if you overlay a logo.
## WhatsApp Link Generator
URL: https://toolfyra.vercel.app/whatsapp-link-generator.html
Category: Generators
Free WhatsApp link generator: create wa.me click-to-chat links with a pre-filled message — without saving the number. Share or download as QR code.
A WhatsApp click-to-chat link (wa.me/number) opens a chat with a phone number without saving it to contacts. Add a pre-filled message with the ?text= parameter. Businesses print these links on packaging, bios and ads so customers can start a chat in one tap. The generated link can also be shared as a QR code for offline use.
Q: Do I need to include the country code?
A: Yes — enter the full number in international format without + or dashes, e.g. 923001234567.
Q: Can I pre-fill the message?
A: Yes — any text you enter becomes the first message in the chat.
Q: Does the link expire?
A: Never. wa.me links are official WhatsApp format and work as long as the number is on WhatsApp.
## Image Compressor
URL: https://toolfyra.vercel.app/image-compressor.html
Category: Image Tools
Free image compressor: shrink JPG, PNG or WebP files in your browser. Slide for quality or compress to a target size in KB. Nothing is uploaded.
This compressor reduces image file size by re-encoding with adjustable quality, entirely in your browser — your photos never leave your device. Use the quality slider for general compression, or set a target size in KB when a portal demands a maximum (e.g. under 100 KB). The tool automatically finds the best quality that fits your target.
Q: Are my images uploaded to a server?
A: No. Compression uses the HTML canvas on your device — files never leave your browser.
Q: How does 'target size' mode work?
A: It binary-searches the quality level to get under your KB limit with the highest possible quality.
Q: Which formats are supported?
A: JPG, PNG and WebP input; output is JPG (best compression) or WebP.
## Image Resizer
URL: https://toolfyra.vercel.app/image-resizer.html
Category: Image Tools
Free image resizer: resize photos to exact pixel dimensions with aspect-ratio lock. Choose JPG, PNG or WebP output. Private, no upload.
Resizing changes an image's pixel dimensions without uploading it anywhere. Lock the aspect ratio to avoid stretching. Common uses: profile photos (e.g. 400×400), form uploads with dimension rules, email attachments and social media crops. Output formats: JPG (photos), PNG (graphics with text), WebP (smallest files).
Q: Will resizing reduce quality?
A: Downscaling keeps images sharp; heavy upscaling can look soft. The tool uses smooth browser scaling.
Q: How do I keep proportions?
A: Leave the aspect lock ticked — change one dimension and the other follows.
Q: Is any image uploaded?
A: No — resizing happens on your device using canvas.
## Image Converter (WebP → JPG)
URL: https://toolfyra.vercel.app/image-converter.html
Category: Image Tools
Free image converter: convert WebP to JPG or PNG (and vice versa) in your browser. Fixes 'format not supported' upload errors. No upload, instant.
Many government portals, job sites and older software still reject WebP images. This converter re-encodes any WebP, JPG or PNG into your chosen format right in the browser. For photos choose JPG; for graphics with transparency choose PNG. Note: HEIC (iPhone) conversion is coming soon.
Q: Why do portals reject WebP?
A: WebP is newer; many older upload systems only accept JPG/PNG. Converting to JPG fixes it.
Q: Which output should I pick?
A: JPG for photos (smaller), PNG for screenshots/graphics or when transparency is needed.
Q: Is HEIC (iPhone photo) supported?
A: HEIC support is on the roadmap — meanwhile, export from the iPhone as 'Most Compatible' or convert via this tool after changing format.
## Merge PDF
URL: https://toolfyra.vercel.app/merge-pdf.html
Category: PDF Tools
Free PDF merger: combine multiple PDF files into one document, in your chosen order. 100% browser-based — files never leave your device. No signup.
Merging combines several PDFs into a single document in the order you choose — useful for applications (cover letter + CV + certificates), invoices, or scanned documents. This tool uses PDF-Lib in your browser: files are never uploaded, which also makes it faster and private. Add files, arrange the order, merge and download.
Q: How many PDFs can I merge?
A: There is no hard limit — very large combined files may be slower on older phones.
Q: Can I control the page order?
A: Files merge top-to-bottom in the list. Remove and re-add to change order (drag-to-reorder is coming).
Q: Are my documents uploaded?
A: No. Merging happens locally with JavaScript — nothing leaves your device.
## JPG to PDF
URL: https://toolfyra.vercel.app/jpg-to-pdf.html
Category: PDF Tools
Convert JPG and PNG images to a single PDF free — in your browser. Photos never upload, perfect for scans and documents. No watermark.
Converting images to PDF creates a standard document from photos of papers, receipts, ID cards or notes — each image becomes one page in order. Because conversion is browser-based, private documents stay private. For best results photograph pages in good light; use our Document Scanner-quality tips: flat surface, no shadows.
Q: What image formats can I convert?
A: JPG and PNG (WebP is auto-converted to JPG first).
Q: Can I reorder pages?
A: Pages follow the file order in the list — remove and re-add to change it (drag reorder coming soon).
Q: Is there a watermark?
A: Never. Output is a clean PDF with your images only.
## PDF Page Extractor
URL: https://toolfyra.vercel.app/pdf-page-extractor.html
Category: PDF Tools
Free PDF page extractor: pull selected pages (e.g. 1,3,5-8) into a new PDF. Browser-based, no upload, no signup.
Extracting pages creates a new PDF containing only the pages you specify — ideal for sharing a section of a contract, submitting selected certificate pages, or trimming scanned documents. Repeating a page number duplicates it; reversed ranges reorder pages. Everything is processed locally.
Q: How do I specify pages?
A: Use commas and ranges: 1,3,5-8. Pages count from 1.
Q: Can I reorder pages with this tool?
A: Yes — the new PDF follows your entry order, e.g. 3,1,2.
Q: Is the file uploaded anywhere?
A: No — extraction runs in your browser with PDF-Lib.
## YouTube Thumbnail Downloader
URL: https://toolfyra.vercel.app/youtube-thumbnail-downloader.html
Category: Social & Video
Free YouTube thumbnail downloader: paste any video link and view/download its thumbnails in all resolutions (HD 1280px and more). Fast, free, no signup.
A YouTube thumbnail downloader reveals the thumbnail images of any public video in all available resolutions — from 120px up to maxres 1280px (when the uploader provided HD). Creators use it to study successful packaging, designers for references, and editors to check how their own video appears. Only public video thumbnails are accessible.
Q: Which resolutions are available?
A: default 120×90, medium 320×180, high 480×360, standard 640×480 and maxres 1280×720 — maxres only exists if the uploader uploaded HD art.
Q: Why does maxres show 'not available' for some videos?
A: The uploader never provided a high-resolution thumbnail. Use sd or hq instead.
Q: Can I use someone's thumbnail?
A: Thumbnails are copyrighted by their creators — use for research/reference, not republishing.
## Flight Compensation Checker (EU261)
URL: https://toolfyra.vercel.app/flight-compensation-checker.html
Category: Travel & Documents
Free EU261 flight compensation checker: delayed 3+ hours, cancelled or denied boarding? Check if you're owed €250–600 and generate a ready claim letter.
Under EU Regulation 261/2004 and UK261, passengers get €250–600 (or £) when a flight is delayed 3+ hours, cancelled with under 14 days' notice, or they're denied boarding — when the cause is within the airline's control. Amounts depend on flight distance. The 2026 reform shortened the claim window to 9 months, so check early. This tool estimates eligibility and generates a formal claim letter you can send to the airline yourself — keeping 100% of the compensation.
Q: How much can I claim?
A: €250 for flights under 1,500 km; €400 for 1,500–3,500 km; €600 over 3,500 km. UK amounts mirror this in pounds.
Q: Which flights are covered?
A: Flights departing from the EU/UK (any airline), and flights arriving in the EU/UK on an EU/UK airline.
Q: What are 'extraordinary circumstances'?
A: Weather, ATC strikes, security risks — the airline owes nothing for these. Technical faults and crew issues usually count in your favour.
Q: How long do I have to claim?
A: For disruptions before the 2026 reform, claim windows of 2–6 years applied in most EU/UK jurisdictions. New rules shorten this — check early. If the airline stalls ~2 months, escalate free via your country's Aviation ADR scheme — no claims company (they take 20–35%) is needed.
Q: Should I take a voucher instead of cash?
A: Airlines often offer travel vouchers (sometimes worth more than the €600 cash). Cash is your legal right for a qualifying 3+ hour delay — accept a voucher only if it genuinely suits you.
Q: Is this legal advice?
A: No — it is an informative estimate based on published regulation bands.
## Visa & DV Lottery Photo Checker
URL: https://toolfyra.vercel.app/visa-photo-checker.html
Category: Travel & Documents
Free visa photo checker: validate your photo against US DV Lottery (600×600px, ≤240KB), US passport, Schengen and Canada specs — instantly in your browser.
Wrong photos are the number one avoidable reason visa and DV Lottery applications get rejected. This checker validates your image against the exact technical rules: US DV Lottery (exactly 600×600px JPEG, ≤240KB), US passport/visa (2×2 in), Schengen (35×45mm) and Canada (50×70mm). A head-alignment guide shows the required framing. Photos are processed on your device only.
Q: What are the exact DV Lottery photo rules?
A: JPEG file, exactly 600×600 pixels, under 240KB, 24-bit color, white background, head 50–69% of image height, neutral expression. Non-compliant photos are the top disqualification reason.
Q: Is my photo uploaded?
A: No — checking runs entirely in your browser. The photo never leaves your device, so no third party (including us) can see or store it.
Q: Are third-party photo checkers trustworthy?
A: The US government offers its own photo tool (tsg.phototool.state.gov) for the final crop check. Use this checker to validate technical specs privately first — then the official tool if you want a second opinion. Never email your photo to unknown services.
Q: What about EXIF metadata in my photo?
A: The DV entry system does not inspect EXIF data, and this checker reads pixels only — it never stores anything. Re-saving your photo in any editor also strips most metadata if you prefer a clean file.
Q: Does this guarantee acceptance?
A: It validates all technical specs. Final approval is always the consulate's decision — also follow the framing guide for head position.
## Tip Calculator
URL: https://toolfyra.vercel.app/tip-calculator.html
Category: Money & Business
Free tip calculator: add a tip percentage, split the bill between friends and see exactly what each person pays. Instant, no signup.
A tip calculator works out the tip on a restaurant or service bill, adds it to the total and splits everything evenly across the group. Standard US tipping is 15–20% for restaurant service. Rounding per person avoids awkward cash moments.
Q: How much should I tip?
A: In the US, 15–20% is standard for restaurants; 10% is common in many other countries. The slider covers 0–50%.
Q: Does it round per person?
A: Yes — round-up option makes every share a whole amount where possible.
Q: Can I split between any number of people?
A: Yes, from 1 to 100.
## GST / VAT Calculator
URL: https://toolfyra.vercel.app/gst-vat-calculator.html
Category: Money & Business
Free GST/VAT calculator: add tax to a net price or remove (reverse) tax from a gross price. Instant net, tax and gross amounts.
GST/VAT calculators solve two problems: adding tax to a net price, and extracting the tax portion from a gross (tax-inclusive) price. Reverse calculation divides by (1 + rate), because the gross already contains the tax. Common rates: India GST 5/12/18/28%, UK VAT 20%, EU VAT 17–27%, Pakistan GST 18%.
Q: How do I remove GST from a total?
A: Divide the gross amount by (1 + rate/100). Example: remove 18% from 1180 → 1180 / 1.18 = 1000 net, 180 tax.
Q: Which rates are supported?
A: Any custom rate — preset buttons for common ones (5%, 12%, 18%, 20%, 28%) are provided.
Q: Does it work for VAT too?
A: Yes — VAT, GST and sales tax all use the same percentage math.
## Profit Margin Calculator
URL: https://toolfyra.vercel.app/profit-margin-calculator.html
Category: Money & Business
Free profit margin calculator: compute margin %, markup % and profit from cost and selling price — or find the right price for a target margin.
Margin is profit as a share of the selling price; markup is profit as a share of cost. Mixing them up is the classic pricing mistake: a 50% markup gives only a 33% margin. This calculator does both directions — analyze an existing price, or reverse-engineer the price needed to hit a target margin.
Q: What is the difference between margin and markup?
A: Margin = profit ÷ selling price. Markup = profit ÷ cost. A 100% markup equals a 50% margin.
Q: What is a good profit margin?
A: It varies by industry — retail often runs 20–50% gross margin; services can be much higher.
Q: Can I compute the price for a target margin?
A: Yes — enter cost and the margin you want; the price field calculates it.
## Compound Interest Calculator
URL: https://toolfyra.vercel.app/compound-interest-calculator.html
Category: Money & Business
Free compound interest calculator: project savings growth with yearly/quarterly/monthly compounding and regular contributions. Year-by-year table.
Compound interest pays interest on interest. The formula is A = P(1 + r/n)^(nt) plus the future value of regular monthly contributions. Compounding frequency matters: monthly compounding beats yearly at the same nominal rate. This calculator shows a full year-by-year growth table so you can see the curve accelerate.
Q: Which compounding frequency should I choose?
A: Match your real product: savings accounts usually compound monthly; many bonds/certificates annually.
Q: Do contributions count as start or end of month?
A: This calculator adds them at month-end (ordinary annuity) — the standard convention.
Q: Is inflation included?
A: No — results are nominal. Subtract expected inflation (~2–3%) to think in real terms.
## Invoice Generator
URL: https://toolfyra.vercel.app/invoice-generator.html
Category: Money & Business
Free invoice generator: create a professional invoice with items, tax and totals — then print or save as PDF from your browser. No signup, no watermark.
This invoice generator builds a professional invoice in your browser: business and client details, unlimited line items, tax percentage, notes and live totals. When you print (Ctrl/Cmd+P or the button), choose 'Save as PDF' as the destination — the invoice prints clean without any website furniture. Nothing is uploaded anywhere.
Q: How do I save the invoice as a PDF?
A: Click Print / Save PDF, then choose 'Save as PDF' as the printer destination in the dialog.
Q: Can I add my logo?
A: Yes — paste a hosted image URL into the logo field, or add it later in your PDF editor.
Q: Is it really free with no watermark?
A: 100% free, no watermark, no signup — your data never leaves your browser.
## TDEE & Calorie Calculator
URL: https://toolfyra.vercel.app/tdee-calorie-calculator.html
Category: Health & Fitness
Free TDEE calculator: find your daily calorie needs with the Mifflin-St Jeor formula, plus cut and bulk targets. Metric and imperial.
TDEE (Total Daily Energy Expenditure) is the number of calories you burn per day including activity. This calculator uses the Mifflin-St Jeor equation — the most accurate widely-used BMR formula — multiplied by an activity factor. A deficit of ~500 kcal/day approximates 0.5 kg (1 lb) fat loss per week; a small surplus supports lean muscle gain.
Q: Which formula is used?
A: Mifflin-St Jeor for BMR, then an activity multiplier (1.2 sedentary to 1.9 athlete) for TDEE.
Q: Why is my TDEE different from a fitness app?
A: Wearables estimate steps/heart-rate on top of BMR; differences of ±10% are normal. Track weight trends over 2–3 weeks to calibrate.
Q: Should I eat below my BMR?
A: Generally no — deficits are taken from TDEE, not BMR. Very low calorie diets need medical supervision.
## Pregnancy Due Date Calculator
URL: https://toolfyra.vercel.app/pregnancy-due-date-calculator.html
Category: Health & Fitness
Free pregnancy due date calculator: estimated due date from your last period, current week, trimester dates. Based on Naegele's rule.
The standard due-date estimate (Naegele's rule) adds 280 days to the first day of the last menstrual period, adjusted for cycle length. Only about 4% of babies arrive exactly on the due date — full term spans week 37 to 42. This tool also shows your current gestational week and trimester boundaries. It is an estimate, not medical advice.
Q: How accurate is the due date?
A: It is an estimate; most babies arrive between 37–42 weeks. Your doctor's ultrasound dating is the gold standard.
Q: My cycle is longer than 28 days — does that matter?
A: Slightly — ovulation likely happened later. The calculator adjusts by your cycle length.
Q: When does each trimester start?
A: First: week 1–13, second: week 14–27, third: week 28–birth.
## Ovulation Calculator
URL: https://toolfyra.vercel.app/ovulation-calculator.html
Category: Health & Fitness
Free ovulation calculator: predict your fertile window and next period from cycle length and last period date. Calendar-method estimate.
The calendar method estimates ovulation about 14 days before the next expected period, with a fertile window of roughly the 5 days before plus ovulation day. Sperm survive up to 5 days, so the window matters more than the single day. Cycles vary month to month — this is an estimate, not contraception guidance.
Q: How is ovulation estimated?
A: Ovulation ≈ next period minus 14 days; the fertile window covers 5 days before through 1 day after.
Q: Is this a reliable contraception method?
A: No — calendar predictions have real failure rates. Use proven contraception; this tool is for awareness.
Q: My cycles are irregular — will this work?
A: Irregular cycles make predictions much less reliable. Consider ovulation test kits or medical advice.
## Time Zone Converter
URL: https://toolfyra.vercel.app/timezone-converter.html
Category: Travel & Documents
Free time zone converter: convert any time between UTC, New York, London, Berlin, Dubai, Karachi, India and more. Perfect for remote meetings.
A time zone converter translates a wall-clock time between zones — essential for remote teams and international calls. This tool uses your browser's built-in time zone database (IANA), so daylight-saving shifts are handled correctly for every date. Pick a time, choose zones, and see the equivalent everywhere at once.
Q: Does it handle daylight saving time?
A: Yes — conversion uses the IANA database in your browser, so DST is correct for the chosen date.
Q: Which zones are included?
A: Common ones for remote work: UTC, US, UK, EU, Gulf, South Asia and more — 16 zones.
Q: Can I plan a meeting?
A: Enter the time, compare the rows, and avoid zones that land between midnight and 7 AM.
## CGPA / Percentage Converter
URL: https://toolfyra.vercel.app/gpa-percentage-converter.html
Category: Calculators
Free CGPA to percentage calculator: convert CGPA↔percentage using the CBSE (×9.5) and HEC-style (÷4) formulas. Also 4.0 GPA scale guide.
Conversion between CGPA and percentage depends on the grading system: India's CBSE multiplies CGPA (out of 10) by 9.5, while HEC Pakistan-style systems derive percentage as CGPA ÷ 4 × 100. Because no universal standard exists, this tool shows both formulas plus a reference table — always confirm which formula your institution requires.
Q: Which formula should I use?
A: CBSE (India) students use CGPA × 9.5. Many Pakistani universities use (CGPA/4)×100. Check your institution's official conversion.
Q: How do I convert percentage back to CGPA?
A: Enter percentage and read the CGPA row — both formulas are inverted for you.
Q: Is there one universal formula?
A: No — conversions are institution-specific. This tool gives the two most common standards.
## Land Area Converter
URL: https://toolfyra.vercel.app/land-area-converter.html
Category: Calculators
Free land area converter: convert between Marla, Kanal, Acre, Hectare, Square Feet, Square Yards and Square Meters instantly.
South Asian property is measured in Marla and Kanal (1 Kanal = 20 Marla = 6,050 sq yd... in the standard 5,445 sq ft system used in Punjab). This converter translates any land value into all common units simultaneously using the standard definitions: 1 Marla = 272.25 sq ft, 1 Kanal = 5,445 sq ft, 1 Acre = 43,560 sq ft. Useful for plots, files, and real-estate deals.
Q: How many square feet is 1 Marla?
A: In the standard (Punjab) system: 1 Marla = 272.25 sq ft. Some cities use 225 or 250 sq ft locally — confirm locally for legal documents.
Q: How many Marla in 1 Kanal?
A: 20 Marla = 1 Kanal = 5,445 sq ft (standard).
Q: How big is an acre in Marla?
A: 1 acre = 43,560 sq ft ≈ 160 Marla (standard system).
## Date Difference Calculator
URL: https://toolfyra.vercel.app/date-difference-calculator.html
Category: Calculators
Free date difference calculator: days, weeks, months and working days between two dates. Great for deadlines, projects and countdowns.
A date difference calculator counts the time between two calendar dates: total days, weeks and days, calendar months and days, and business days (Monday–Friday, excluding weekends). Useful for contract timelines, notice periods, project planning, visa durations and event countdowns.
Q: Are both days counted or just the gap?
A: The gap (end minus start). Add 1 manually if you need both dates included.
Q: What are business days?
A: Monday through Friday — public holidays are not excluded (they vary by country).
Q: Can I count down to a future date?
A: Yes — put a future date as the end date; negative results mean reversed order.
## Meta Tag Generator
URL: https://toolfyra.vercel.app/meta-tag-generator.html
Category: SEO & Marketing
Free meta tag generator: build SEO title, description, keywords, canonical, Open Graph and Twitter tags with live length checks. Copy-paste ready HTML.
Meta tags tell search engines and social platforms what a page is about. Title tags should run roughly 50–60 characters, meta descriptions 140–160, to avoid truncation in results. Open Graph tags control how links preview on WhatsApp, Facebook and LinkedIn; Twitter cards do the same on X. This generator builds the full block with live counters.
Q: What is the ideal title length?
A: About 50–60 characters — Google truncates around 580 pixels, roughly 60 chars.
Q: Are meta keywords still useful?
A: Google ignores them, but some smaller engines read them. Optional.
Q: What are Open Graph tags?
A: They control the title, description and image shown when your link is shared on social apps.
## UTM Link Builder
URL: https://toolfyra.vercel.app/utm-builder.html
Category: SEO & Marketing
Free UTM link builder: add utm_source, utm_medium and campaign parameters to any URL for clean Google Analytics tracking.
UTM parameters are tags appended to a URL (utm_source, utm_medium, utm_campaign) that Google Analytics and other tools use to attribute visits to specific campaigns. Consistent naming — lowercase, no spaces — keeps reports clean. Build one link per channel: newsletter, Instagram bio, ad set, so results are never mixed together.
Q: Which UTM parameters are required?
A: utm_source and utm_medium at minimum; utm_campaign for campaign grouping.
Q: Does UTM affect SEO?
A: No — with a canonical tag set, UTM variants don't split rankings.
Q: Any naming tips?
A: All lowercase, hyphens not spaces, one convention forever: e.g. source=instagram, medium=bio, campaign=spring-sale.
## Robots.txt Generator
URL: https://toolfyra.vercel.app/robots-txt-generator.html
Category: SEO & Marketing
Free robots.txt generator: allow or block search engines, disallow private folders, add sitemap URL. Copy-paste ready for your site root.
robots.txt lives at your domain root and tells crawlers which paths they may fetch. Disallow hides pages from crawling (not indexing) — for true de-indexing use noindex. Every site should also declare its XML sitemap here. Block only what genuinely needs blocking: admin paths, cart, internal search results.
Q: Where does robots.txt go?
A: At the domain root: https://example.com/robots.txt — exactly one per domain.
Q: Does Disallow stop pages appearing on Google?
A: No — Disallow stops crawling. To remove from results use a noindex meta tag (which requires crawling).
Q: Should I block AI bots?
A: Optional: GPTBot, CCBot and others can be blocked with specific user-agent rules.
## URL Slug Generator
URL: https://toolfyra.vercel.app/slug-generator.html
Category: SEO & Marketing
Free URL slug generator: turn any title into a clean, lowercase, SEO-friendly URL slug. Accents converted, stop words optional.
A URL slug is the human-readable part of a URL after the domain. Good slugs are short, lowercase, hyphenated and keyword-rich: /best-free-pdf-tools beats /p?id=8123. This generator lowercases, removes accents, strips punctuation and collapses hyphens — live as you type, with an optional stop-word remover for shorter slugs.
Q: How long should a slug be?
A: 3–5 meaningful words is ideal. Shorter is fine if the keyword is clear.
Q: Should I include dates in slugs?
A: Usually no — undated slugs stay evergreen and get updated content re-shared.
Q: Can I change slugs later?
A: Yes, but set a 301 redirect from the old URL to keep rankings.
## Keyword Density Checker
URL: https://toolfyra.vercel.app/keyword-density-checker.html
Category: SEO & Marketing
Free keyword density checker: analyze single words and 2-word phrases with counts and percentages. Spot over-optimization before Google does.
Keyword density is the share a word or phrase occupies among all words. There is no magic target, but natural writing usually keeps the top keyword under 2–3%; beyond that reads as stuffing. This tool ranks 1-word and 2-word phrases so you can check your main keyword's prominence and discover accidental repetition.
Q: What density is safe?
A: There's no official number — under ~2–3% for a single keyword is a common sanity check. Write for humans first.
Q: Are stop words counted?
A: Common English stop words are excluded from single-word ranking; 2-word phrases keep natural pairs.
Q: Can I analyze competitor pages?
A: Paste any public page's text — check its focus keywords and gaps.
## Readability Checker
URL: https://toolfyra.vercel.app/readability-checker.html
Category: SEO & Marketing
Free readability checker: score your text with the Flesch Reading Ease test, average sentence length and grade level hints. Improve clarity instantly.
The Flesch Reading Ease formula scores text from 0 (very difficult) to 100 (very easy): 206.835 − 1.015 × (words/sentence) − 84.6 × (syllables/word). Most web content should score 60–70 (plain English, ~8th grade). Shorter sentences and simpler words raise the score — which correlates with better engagement and rankings.
Q: What score should I aim for?
A: 60–70 suits general audiences; 70+ is very easy. Legal/academic text scores lower by nature.
Q: How are syllables counted?
A: By a standard vowel-group heuristic — accurate enough for scoring trends, not dictionary-perfect.
Q: How do I improve my score?
A: Split long sentences, swap complex words for simple ones, cut filler phrases.
## Hashtag Generator
URL: https://toolfyra.vercel.app/hashtag-generator.html
Category: SEO & Marketing
Free hashtag generator: create keyword-based hashtag sets for Instagram, TikTok, YouTube, LinkedIn and X — with platform-relevant tags included.
Hashtags help content get discovered on social platforms. A strong set mixes niche tags (small, targeted), medium tags and a few broad platform tags — roughly 3–10 on Instagram, 3–6 on TikTok, 1–2 on X. This generator builds variations from your keyword and appends proven platform-relevant tags. Validate picks inside each platform's search before posting.
Q: How many hashtags should I use?
A: Instagram: 3–10 focused tags. TikTok: 3–6. X/Twitter: 1–2. LinkedIn: 3–5 professional tags.
Q: Are bigger hashtags better?
A: No — huge tags bury you in seconds. Niche + medium tags give real discovery.
Q: Does the tool check tag volume?
A: No — it suggests combinations; verify popularity in the platform's own search.
## YouTube Money Calculator
URL: https://toolfyra.vercel.app/youtube-money-calculator.html
Category: Social & Video
Free YouTube money calculator: estimate ad earnings from monthly views and RPM. See realistic low–high ranges for your channel.
YouTube earnings depend on RPM (revenue per 1,000 views after YouTube's share), which varies wildly by niche and country: $0.5–3 for entertainment, $3–10+ for finance/business content. This calculator multiplies your views by an RPM you control and shows a realistic low–high band. Sponsorships and affiliate income are on top of this.
Q: What is RPM?
A: Revenue per mille — your actual earnings per 1,000 views after YouTube's 45% cut. Found in YouTube Studio > Analytics.
Q: How much does YouTube pay per view?
A: Typically $0.001–$0.05 per view depending on niche/audience — that's why RPM matters more.
Q: Do Shorts earn the same?
A: No — Shorts RPM is far lower (often $0.05–0.15). This calculator is for long-form videos.
## Engagement Rate Calculator
URL: https://toolfyra.vercel.app/engagement-rate-calculator.html
Category: Social & Video
Free engagement rate calculator: compute ER% by followers or reach from likes, comments and shares — with industry benchmarks.
Engagement rate = (likes + comments + shares) ÷ audience, as a percentage. By-followers is the standard cross-account comparison; by-reach is fairer for algorithms that limit visibility. Benchmarks (by followers): under 1% low, 1–3.5% average, 3.5–6% strong, above 6% excellent — brands use ER to price sponsored posts.
Q: Which denominator should I use?
A: By-followers for profile-level comparisons; by-reach for judging individual posts fairly.
Q: What is a good engagement rate?
A: 1–3.5% is typical; 3.5–6% is strong; 6%+ is excellent (varies by platform and size).
Q: Why is my ER dropping?
A: Common causes: follower growth outpacing engagement, repetitive formats, or algorithm reach shifts.
## Instagram Line Break Tool
URL: https://toolfyra.vercel.app/instagram-line-break.html
Category: Social & Video
Free Instagram line break tool: keep blank lines in your captions. Instagram deletes normal empty lines — this invisible-character trick keeps them.
Instagram's caption engine deletes consecutive line breaks, collapsing neatly formatted captions into a wall of text. The fix is a line containing an invisible braille blank character (⠀). Paste your caption, hit format, copy — every line break and spacer survives the upload. Works for TikTok and YouTube descriptions too.
Q: Why does Instagram delete my line breaks?
A: Its parser collapses repeated whitespace/newlines. An invisible character on the empty line prevents collapsing.
Q: Is the invisible character detectable?
A: It's a braille blank (⠀) — renders invisible in the app and is the standard trick used by creators.
Q: Does it work on TikTok too?
A: Yes — the same formatting trick works in TikTok and most social descriptions.
## Fancy Font Generator
URL: https://toolfyra.vercel.app/fancy-font-generator.html
Category: Social & Video
Free fancy font generator: turn text into bold, italic, monospace, circled and small-caps Unicode styles for Instagram bios, TikTok and gaming names. Copy any style.
Fancy fonts are real Unicode characters — mathematical bold, italic, monospace, circled letters and small caps — that render anywhere plain text does: Instagram bios, TikTok names, WhatsApp status, Discord and gaming IDs. They aren't fonts technically, so they stay searchable and don't need any app. Type your text and copy whichever style you like.
Q: Do these fonts work everywhere?
A: Mostly yes — they're standard Unicode. Some older devices miss a glyph or two; test before committing.
Q: Is it good for SEO/usernames?
A: Search engines treat them as separate characters — avoid in URLs/titles; perfect for bios and display names.
Q: Why do some letters look odd in script styles?
A: Unicode has missing glyphs in some alphabets; this tool uses the complete sans/mono/circled sets to avoid that.
## Citation Generator
URL: https://toolfyra.vercel.app/citation-generator.html
Category: Text Tools
Free citation generator: create APA 7 and MLA style citations for websites, books and journals. Copy-paste ready for essays and papers.
Citations credit sources and protect against plagiarism claims. APA 7 (author–date) is common in sciences; MLA 9 (author–page) in humanities. This generator formats websites, books and journal articles into both styles from the same fields. Always double-check punctuation against your institution's handbook — styles have edge cases.
Q: What's the difference between APA and MLA?
A: APA uses (Author, Year) in-text; MLA uses (Author Page). Reference lists differ in formatting details.
Q: What if my source has no author?
A: Start with the title in the citation. For corporate authors, use the organisation name.
Q: Should URLs be included?
A: Yes for websites (APA: include unless a login is required). DOIs are preferred for journals.
## Lorem Ipsum Generator
URL: https://toolfyra.vercel.app/lorem-ipsum-generator.html
Category: Text Tools
Free lorem ipsum generator: create placeholder paragraphs, sentences or words for mockups and wireframes. Classic Latin filler text.
Lorem ipsum is the standard placeholder text used in design mockups since the 1500s, derived from Cicero's writing. It has a natural-looking letter distribution that lets clients judge layout without being distracted by readable content. Generate by paragraphs, sentences or words — with or without the classic opening.
Q: Where does lorem ipsum come from?
A: Scrambled excerpts from Cicero's 'De Finibus Bonorum et Malorum' (45 BC), used in typesetting since the 1500s.
Q: Paragraphs or words?
A: Paragraphs for page layouts; exact word counts for fixed-space components like cards.
Q: Should I ship it in production?
A: Never — replace with real copy before launch so content fits the design.
## Text Diff Checker
URL: https://toolfyra.vercel.app/text-diff-checker.html
Category: Text Tools
Free text diff checker: compare two texts or code snippets line by line. Added, removed and unchanged lines highlighted. Runs in your browser.
A diff checker compares two texts and highlights the differences — indispensable for reviewing contract edits, article revisions, config files and code changes. This tool does a line-level comparison (LCS algorithm) with removed lines in red, added lines in green. For very large files, compare section by section.
Q: What do the colors mean?
A: Red = removed from the left (original), green = added in the right (new), grey = unchanged.
Q: Is it character-level or line-level?
A: Line-level — the standard for documents and code.
Q: Is there a size limit?
A: Best under ~300 lines per side in a browser tab; larger files get slow.
## JSON Formatter
URL: https://toolfyra.vercel.app/json-formatter.html
Category: Developer Tools
Free JSON formatter and validator: beautify messy JSON, minify for production, validate syntax with clear error locations. Runs 100% in your browser.
A JSON formatter re-indents minified JSON into a readable tree, or compresses pretty JSON for production payloads. The validator pinpoints syntax errors (missing commas, unquoted keys, trailing commas) with line and column. APIs, configs and log files are full of JSON — this tool handles them without uploading data anywhere.
Q: Why is my JSON invalid?
A: Common causes: single quotes instead of double, trailing commas, unquoted keys, and Python-style True/False/None (use true/false/null).
Q: Is my API data sent to a server?
A: No — parsing happens with your browser's own JSON engine, locally.
Q: How large a file can it handle?
A: Multi-MB payloads are fine; beyond ~10 MB browsers may slow down.
## CSV to JSON Converter
URL: https://toolfyra.vercel.app/csv-to-json-converter.html
Category: Developer Tools
Free CSV to JSON converter: convert spreadsheet exports to JSON arrays. Handles quoted fields, commas in values, tabs and semicolons. Browser-based.
CSV-to-JSON conversion turns spreadsheet exports into arrays of objects for APIs, apps and databases. This parser handles the tricky parts: quoted fields, embedded commas, escaped double quotes and different delimiters (comma, semicolon, tab — auto-detected or manual). The first row becomes object keys. Reverse JSON-to-CSV is on the roadmap.
Q: What if my data has commas inside values?
A: Wrap those fields in double quotes — the parser reads quoted sections correctly, including "escaped" quotes.
Q: How is the delimiter chosen?
A: Auto-detect compares comma, semicolon and tab counts in the header line; you can also force one.
Q: What about numbers and booleans?
A: Values that look like numbers/true/false are converted to real JSON types (toggle to keep strings).
## Regex Tester
URL: https://toolfyra.vercel.app/regex-tester.html
Category: Developer Tools
Free regex tester: test JavaScript regular expressions with live match highlighting and capture groups. Cheat-sheet included. Runs in your browser.
Regular expressions (regex) find patterns in text — emails, phones, log lines, code. This tester runs your pattern against a test string with live highlighting and shows capture groups per match. Flags control behaviour: g (all matches), i (case-insensitive), m (multiline anchors). Start with \d+ (digits) or \w+@\w+\.\w+ (simple email) from the cheat sheet.
Q: Which regex flavor is used?
A: JavaScript (ECMAScript) — the same engine as Node and browsers.
Q: Why does my match loop forever?
A: Zero-length matches are guarded automatically; also avoid patterns like a* without /g limits.
Q: What are capture groups?
A: Parentheses () capture parts of a match — listed per match below the highlighter.
## Base64 Encoder / Decoder
URL: https://toolfyra.vercel.app/base64-encoder-decoder.html
Category: Developer Tools
Free Base64 encoder and decoder with full UTF-8 (Unicode/emoji) support. Encode text to Base64 or decode Base64 back — private, instant.
Base64 encodes binary data as text using 64 safe characters — used in data URLs, email attachments, JWTs and API payloads. Naive btoa() breaks on non-Latin text; this tool encodes through UTF-8 first, so Urdu, emoji and CJK all round-trip perfectly. Padding and whitespace are tolerated on decode.
Q: Why does atob fail on my Base64?
A: Usually invalid padding or URL-safe characters (- and _). This decoder accepts whitespace; replace -/_ if needed.
Q: Is Base64 encryption?
A: No — it is encoding, not encryption. Anyone can decode it. Never 'hide' secrets in Base64.
Q: Does it support emojis and Urdu?
A: Yes — full UTF-8 round-trip encoding.
## URL Encoder / Decoder
URL: https://toolfyra.vercel.app/url-encoder-decoder.html
Category: Developer Tools
Free URL encoder/decoder: percent-encode special characters for safe links, or decode %20-style strings back. Component and full-URL modes.
URLs can only contain a limited character set; spaces, ampersands, Urdu and emoji must be percent-encoded (%20 = space). encodeURIComponent is for query values (it escapes & and =); encodeURI keeps URL structure intact. This tool does both directions instantly — essential for debugging query strings and tracking links.
Q: Component vs full URI mode?
A: Component mode escapes & = ? / (for query parameter values); full-URI mode preserves URL structure characters.
Q: Why is my link broken with spaces?
A: Unencoded spaces and symbols break URLs — encode the values before using them.
Q: What is %20?
A: The space character in percent-encoding. %2F is /, %26 is &.
## Hash Generator (SHA-256)
URL: https://toolfyra.vercel.app/hash-generator.html
Category: Developer Tools
Free SHA hash generator: create SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text using the Web Crypto API. Fast, private, UTF-8 safe.
Hash functions create fixed-length fingerprints of data. SHA-256 is today's standard for integrity checks and deduplication; SHA-1 is legacy (avoid for security). This tool uses your browser's native Web Crypto API — fast and completely offline. MD5 is not offered because browsers don't implement it natively and it's cryptographically broken.
Q: Why no MD5?
A: Browsers' Web Crypto doesn't include it, and MD5 is broken for security purposes. Use SHA-256.
Q: Can a hash be reversed?
A: No — hashes are one-way. Identical input always gives the identical hash.
Q: What are hashes used for?
A: File integrity checks, deduplication, change detection, password storage (with salting/KDFs).
## UUID Generator
URL: https://toolfyra.vercel.app/uuid-generator.html
Category: Developer Tools
Free UUID v4 generator: create one or bulk-generate hundreds of cryptographically random unique identifiers. Copy individually or all at once.
A UUID v4 is a 122-bit random identifier formatted as 8-4-4-4-12 hex digits — collisions are astronomically improbable (~1 in 10^36 for a handful). Used for database keys, API request IDs, filenames and distributed systems. This generator uses crypto.randomUUID (or an equivalent fallback), never sequential counters.
Q: Can UUIDs collide?
A: Practically never — generating a duplicate requires generating ~2.7 quintillion v4 UUIDs.
Q: Are they secure as secrets?
A: v4 is random enough to be unguessable, but for tokens use 256-bit random and store hashed.
Q: Uppercase or braces?
A: Lowercase plain is the convention; strip hyphens for DB columns with length limits.
## Epoch Timestamp Converter
URL: https://toolfyra.vercel.app/epoch-timestamp-converter.html
Category: Developer Tools
Free Unix timestamp converter: convert epoch seconds/milliseconds to human dates and back, with UTC and local time. Now button included.
Unix time counts seconds since 1970-01-01 UTC — the standard time format for databases, APIs and logs. Millisecond timestamps (13 digits, common in JavaScript/Java) are detected automatically against 10-digit second timestamps. Debug API dates, expiry claims (JWT exp) and log lines in seconds.
Q: Seconds or milliseconds?
A: 10 digits = seconds, 13 digits = milliseconds. This tool auto-detects. 1e12–1e14 boundary values are shown both ways if ambiguous.
Q: What happens at 2038?
A: 32-bit signed seconds overflow in January 2038 — modern 64-bit systems are unaffected.
Q: Is epoch affected by time zones?
A: No — Unix time is always UTC; display converts to local zones.
## JWT Decoder
URL: https://toolfyra.vercel.app/jwt-decoder.html
Category: Developer Tools
Free JWT decoder: decode JSON Web Token header and payload, inspect expiry (exp) and issued times. Client-side only — tokens never leave your browser.
A JSON Web Token has three dot-separated Base64URL parts: header (algorithm), payload (claims) and signature. This decoder reveals the header and payload with human-readable iat/exp/nbf timestamps. Decoding is not verification — the signature can only be validated with the secret/public key on a server. Never paste production tokens anywhere you don't trust.
Q: Does decoding verify the token?
A: No — decoding just reads it. Verification requires the signing key and must happen server-side.
Q: Is it safe to paste my token here?
A: Processing is local (no network), but treat tokens like passwords — use test tokens where possible.
Q: What is the exp claim?
A: Expiry time as a Unix timestamp. Expired tokens must be rejected by the server.
## Cron Expression Generator
URL: https://toolfyra.vercel.app/cron-expression-generator.html
Category: Developer Tools
Free cron expression generator: build crontab schedules with presets or custom fields, with plain-English explanation. For Linux cron, n8n and cloud schedulers.
A cron expression schedules tasks with five fields: minute, hour, day-of-month, month and day-of-week (*/5 * * * * = every 5 minutes). Cron syntax is powerful but cryptic; this generator builds valid expressions from presets and custom fields, and explains what the expression means in plain English. Works for Linux crontab, n8n, GitHub Actions (5-field) and most cloud schedulers.
Q: What do the 5 fields mean?
A: Minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (0-6, Sunday=0).
Q: What does */5 mean?
A: Every 5th value — */5 in minutes = every 5 minutes.
Q: Does it work with 6-field (with seconds)?
A: Cron parsers differ — remove the seconds field for standard 5-field cron (n8n accepts both).
## Color Picker from Image
URL: https://toolfyra.vercel.app/color-picker-from-image.html
Category: Image Tools
Free color picker from image: upload a photo and pick any pixel's color, plus extract the dominant color palette. HEX, RGB, HSL — copy ready.
Designers and developers constantly need exact colors from screenshots, photos and brand assets. This eyedropper samples any pixel from an uploaded image and reports HEX, RGB and HSL values, then extracts the dominant palette by color quantization. Clicking any swatch copies its HEX value. Images are processed on your device only.
Q: Which color formats are shown?
A: HEX (#a1b2c3), RGB and HSL — click any value to copy.
Q: How is the palette extracted?
A: The image is sampled on a grid, colors are quantized into buckets, and the most frequent buckets become your palette.
Q: Does it work on phone?
A: Yes — tap on the image instead of clicking.
## EXIF / Metadata Remover
URL: https://toolfyra.vercel.app/exif-metadata-remover.html
Category: Image Tools
Free EXIF metadata remover: strip GPS location, camera info and timestamps from photos by clean re-encoding. Privacy protection, in your browser.
Photos carry EXIF metadata: GPS coordinates, device model, timestamps and editing history — a real privacy risk when sharing. This tool removes metadata by redrawing the image on a clean canvas and re-encoding it; only pixels survive. Optional max-dimension resizing further reduces file size. All processing is on your device.
Q: How does it remove metadata?
A: By re-encoding: the canvas only draws pixels, so all EXIF/GPS/ICC chunks are dropped.
Q: Does quality change?
A: Slightly — you choose the output quality. Visually it stays the same at 90%+.
Q: What about screenshots?
A: Screenshots carry little EXIF, but re-encoding also cleans them and can shrink file size.
## Image Watermark Tool
URL: https://toolfyra.vercel.app/image-watermarker.html
Category: Image Tools
Free image watermark tool: add text watermarks (logo-style) to photos with position, opacity, size and tiling options. Protect your work — private in-browser.
Watermarking discourages unauthorized reuse of your photos and brands your work. This tool stamps configurable text — choose one of 9 positions or tile across the whole image, set opacity, size and color. Photographers, Etsy sellers and students protecting assignments use it daily. Files never leave your device.
Q: Which position is best?
A: Bottom-right at 40–60% opacity is standard; tiling deters cropping.
Q: Can I use my logo image instead of text?
A: Text now; image-logo support is on the roadmap.
Q: Will quality drop?
A: PNG output is lossless; JPG at 92% is visually identical for photos.
## Screenshot Stitcher
URL: https://toolfyra.vercel.app/screenshot-stitcher.html
Category: Image Tools
Free screenshot stitcher: combine multiple screenshots into one long vertical image — perfect for chats, reviews and threads. No upload.
Long screenshots (a full chat, product reviews, a thread) require stitching multiple captures vertically. This tool aligns all images to a common width and stacks them in your chosen order, outputting a single PNG. A subtle divider can be toggled. Everything is local — private conversations stay private.
Q: How is width handled?
A: All screenshots are scaled to the narrowest width so nothing gets cropped.
Q: What is the maximum height?
A: Browsers cap canvases around 32,000px — very long captures should be split into two stitches.
Q: Can I reorder after adding?
A: Remove and re-add in the right order (drag-reorder is coming).
## Favicon Generator
URL: https://toolfyra.vercel.app/favicon-generator.html
Category: Image Tools
Free favicon generator: turn any logo or image into 16, 32, 48, 180, 192 and 512px favicons with ready-to-paste HTML code. No upload.
Favicons are the small site icons in browser tabs, bookmarks and phone home screens. Modern browsers accept PNG favicons in a few sizes: 32/16 for tabs, 180 for Apple touch, 192/512 for Android/PWA. This generator center-crops your image to squares, exports all sizes and gives you the exact tags to paste. (Legacy .ico is rarely needed now.)
Q: Do I still need favicon.ico?
A: Modern browsers support PNG favicons via tags; .ico is only needed for very old browsers.
Q: Which source image works best?
A: A square logo at least 512×512 with a simple, high-contrast shape.
Q: Where do the files go?
A: Upload them to your site root (or /assets) and keep the generated link tags matching the paths.
## Universal Downloader
URL: https://toolfyra.vercel.app/universal-downloader.html
Category: Social & Video
Free universal downloader: paste a link from YouTube, TikTok, Vimeo, Dailymotion or Reddit to auto-fetch thumbnails & metadata, or drop any video file for screenshots & frame sheets. 100% in your browser.
One page for every download task. From a link: paste any video URL and the tool detects the platform, then auto-fetches the title, author and best thumbnail via official public APIs — YouTube, TikTok, Vimeo, Dailymotion and Reddit are fully supported, and YouTube thumbnails download in every size including max-resolution (maxresdefault). From your device: drag & drop any video file (MP4, WebM, MOV) to instantly see its duration, resolution and file size, capture a crisp PNG screenshot at any moment, or generate a 6-frame contact sheet for previews and storyboards. Everything runs 100% inside your browser — files are never uploaded to any server. Honest note: direct video-FILE ripping from platforms needs server-side tools (and breaks most platforms' Terms of Service); this downloader gives you everything that is genuinely possible in a browser: metadata, thumbnails, screenshots and file analysis.
Q: What is a universal downloader?
A: A universal downloader is a single tool that handles downloads from many sources in one place. This one works two ways: paste a link from supported platforms (YouTube, TikTok, Vimeo, Dailymotion, Reddit) to auto-fetch thumbnails and metadata, or drop your own video file to extract screenshots, contact sheets and technical details — all free, with no sign-up.
Q: Which sites does the link downloader support?
A: YouTube, TikTok, Vimeo, Dailymotion and Reddit are fully supported for auto-fetch (title, author, thumbnail) using their official public APIs. Instagram, Facebook and X/Twitter links are detected but those platforms block browser metadata access (CORS) — the tool tells you honestly and opens the original page instead.
Q: Can I download YouTube videos directly with this?
A: No — and honest tools won't claim to. Direct video-file ripping requires server-side infrastructure and violates YouTube's Terms of Service. What you CAN download here: every YouTube thumbnail size (including max-res 1280px), full metadata, and anything from your own video files (screenshots, frame sheets).
Q: How do I download a YouTube thumbnail?
A: Paste the YouTube watch or Shorts link — the tool instantly shows the thumbnail with one-click download buttons for maxresdefault, sddefault, hqdefault and mqdefault sizes. For advanced options, the dedicated YouTube Thumbnail Downloader tool is linked right in the results.
Q: Is this downloader really free and safe?
A: Yes. There is no sign-up, no watermark, no hidden limit — and because everything runs locally in your browser, your files and links are never uploaded to a server. You can verify it: open your browser's network tab and watch — nothing leaves your device.
Q: Does it work on mobile?
A: Yes — the whole page is mobile-first: tap to pick a video file instead of dragging, and screenshots save straight to your downloads folder like any other file.
## AI Prompt Generator
URL: https://toolfyra.vercel.app/ai-prompt-generator.html
Category: Generators
Free AI prompt generator: build detailed, structured prompts for Midjourney, Stable Diffusion, Flux, DALL-E, ChatGPT, Claude and Gemini in one click. No sign-up.
Good outputs start with good prompts. This generator turns a rough idea into a structured prompt using the patterns prompt engineers actually use: role, task, context, constraints and output format for chat models, or subject, style, lighting, camera and quality tags for image models. Pick your target model and the template adapts — Midjourney gets parameter flags (--ar, --stylize), Stable Diffusion gets weighted tags, ChatGPT gets a role-and-rules wrapper. Everything runs in your browser and nothing is stored.
Q: What makes a good AI prompt?
A: Specific structure: a clear subject, explicit style references, lighting/camera details for images, and role + constraints + output format for chat models. This generator adds that scaffolding for you.
Q: Which models are supported?
A: Prompt templates are tuned for Midjourney (with --ar/--stylize flags), Stable Diffusion and Flux (weighted tags), DALL-E, and chat models ChatGPT, Claude and Gemini.
Q: Is it free and unlimited?
A: Yes — no sign-up, no credit limits, nothing leaves your browser.
## AI Script Generator
URL: https://toolfyra.vercel.app/ai-script-generator.html
Category: Social & Video
Free video script generator: turn any topic into a structured YouTube, TikTok or Reels script — hook, beats, b-roll notes and CTA. Instant, no sign-up.
Every high-retention video follows a structure: hook in the first 3 seconds, value beats, pattern interrupts, and one clear call to action. This generator builds that structure for you — choose YouTube long-form, TikTok or Reels, set your topic and length, and get a full shooting script: timed beats, sample hook lines, b-roll suggestions and CTA. It uses proven retention frameworks (hook–payoff loops, open loops) so your draft starts from a structure that works, not a blank page.
Q: Is the script really usable as-is?
A: It's a professional skeleton: hook, timed beats, b-roll and CTA. Add your specific examples and facts — that's what makes it yours (and honest).
Q: Which platforms does it support?
A: YouTube long-form, YouTube Shorts, TikTok and Instagram Reels — each gets platform-correct pacing and structure.
Q: How long can scripts be?
A: Any length — set the target minutes and the beat timings scale automatically.
## AI Caption Generator
URL: https://toolfyra.vercel.app/ai-caption-generator.html
Category: SEO & Marketing
Free caption generator for Instagram, TikTok, LinkedIn and X: topic + tone in, scroll-stopping captions with emojis and hashtags out. No sign-up.
Each platform rewards a different caption style: Instagram loves line breaks and emoji rhythm, TikTok rewards conversational hooks, LinkedIn wants a story-plus-lesson, X needs punchy one-liners. This generator applies those native patterns to your topic and returns five variations — from bold-hook to storytelling — each inside the platform's comfortable length, with relevant hashtag suggestions. 100% in-browser, unlimited, free.
Q: Are captions platform-optimized?
A: Yes — length, line breaks, emoji density and hashtag counts adapt to Instagram, TikTok, LinkedIn and X conventions.
Q: How many variations do I get?
A: Five per generation: hook-first, story, listicle, question and bold-opinion styles.
Q: Can I regenerate unlimited times?
A: Yes — unlimited, free, nothing uploaded.
## AI Content Idea Generator
URL: https://toolfyra.vercel.app/ai-content-idea-generator.html
Category: SEO & Marketing
Free content idea generator: enter your niche, get 30 days of video/post ideas across proven formats — how-tos, myths, stories, lists and trends. No sign-up.
Creator block is a format problem, not an idea problem. Every niche has the same evergreen angles: how-to, mistakes, myths, tools, stories, comparisons, Q&A and trends. This generator takes your niche and rotates it through 30 proven formats, each labeled by type and effort level, so you can batch-produce a month of content in one sitting. Copy the whole plan as text for your calendar tool.
Q: Are the ideas niche-specific?
A: Yes — your niche keyword is woven into every idea, not generic filler.
Q: What formats are included?
A: How-tos, mistakes/myths, tool roundups, personal stories, comparisons, Q&A, behind-the-scenes and trend reacts — the 8 evergreen families.
Q: Can I use it for any platform?
A: Yes — ideas work for YouTube, TikTok, Reels, blogs and newsletters.
## AI Token Counter
URL: https://toolfyra.vercel.app/ai-token-counter.html
Category: Developer Tools
Free AI token counter: estimate tokens for ChatGPT, Claude and Gemini, and calculate API costs from editable per-million rates. Instant and private.
LLMs read text as tokens — roughly one token per 4 characters or ¾ of a word in English. Providers bill per million tokens with separate input and output rates. This counter estimates tokens from your text using the standard ≈chars/4 heuristic, then multiplies by editable per-model rates — update the two numbers whenever pricing changes and the cost math stays honest. Nothing is sent anywhere.
Q: How accurate is the token estimate?
A: For English text, the ≈4-chars-per-token heuristic lands within a few percent of real tokenizer counts; other languages can vary more. Use it for budgeting, not billing.
Q: Why editable rates instead of a fixed price table?
A: AI pricing changes monthly — editable rates mean you always calculate with the real current numbers from the provider's pricing page.
Q: Is my text uploaded anywhere?
A: No — counting happens entirely in your browser.
## AI Bio Generator
URL: https://toolfyra.vercel.app/ai-bio-generator.html
Category: SEO & Marketing
Free bio generator: create a polished Instagram, TikTok, X or LinkedIn bio in seconds — name line, keywords, emoji style and CTA, within platform limits. No sign-up.
A great bio answers three things fast: who you help, what you post, and what to do next. This generator structures that into platform-native formats — Instagram's 150-character keyword-and-emoji style, TikTok's punchy two-liner, X's searchable first line, LinkedIn's headline-plus-summary — and gives you several variations with a CTA built in. Character counts shown live so nothing gets cut off.
Q: Does it respect platform character limits?
A: Yes — Instagram 150, X 160, TikTok 80 and LinkedIn headline 220 are shown with each suggestion.
Q: Can I use it for business accounts?
A: Absolutely — the professional vibe produces keyword-rich bios that help search discovery.
Q: Is it free?
A: Yes — unlimited generations, no sign-up.
## YouTube Description Generator
URL: https://toolfyra.vercel.app/youtube-description-generator.html
Category: Social & Video
Free YouTube description generator: build SEO descriptions with hooks, keywords, timestamps, links and hashtags in the first-3-lines structure YouTube rewards. No sign-up.
YouTube's search and suggested algorithm reads your description — especially the first 150 characters that show above the fold. This generator builds the full professional layout: a keyword-rich hook line, a natural paragraph, a timestamps template (chapters also unlock YouTube's progress bars), a links/social block and 3 hashtags. Fill in your section times and links, paste, publish.
Q: Why do the first 3 lines matter?
A: They appear above the '...more' fold in watch pages and feed previews — that is where keywords and the hook earn clicks.
Q: Do timestamps really help?
A: Yes — chapters improve retention and let viewers jump to sections; YouTube indexes chapter titles for search.
Q: How many hashtags should I use?
A: Three — YouTube shows the first three above the title; more can look spammy.
## Fake Name Generator
URL: https://toolfyra.vercel.app/fake-name-generator.html
Category: Text Tools
Free fake name generator: create random realistic test names by country and gender for app testing, forms, fiction and privacy. Unlimited, no sign-up, 100% browser-side.
A classic developer tool in the faker.js tradition: this generator assembles realistic-looking but entirely fictional names from country-appropriate first/last name pools (US, UK, Pakistan, India, Germany, France, Spain, Brazil, Japan, Nigeria). Use them to seed test databases, fill sign-up flows, build demo data, name fictional characters, or keep your real name out of public screenshots. All names are randomly assembled — they are not real people, and nothing is stored.
Q: Are these real people's names?
A: No — names are assembled from common first/last name pools per country. They look realistic for validation but do not target or represent any real person.
Q: What can I legally use these for?
A: Software testing, QA fixtures, UI demos, fiction writing, placeholder accounts. Not for impersonation, signing up for services under false pretenses, or anything deceptive.
Q: Can I export the results?
A: Yes — copy as text, or download JSON/CSV with first name, last name and full name columns.
## Fake Address Generator
URL: https://toolfyra.vercel.app/fake-address-generator.html
Category: Text Tools
Free fake address generator: realistic-format fictional addresses for testing forms, QA, demos and fiction — US, UK, Germany, India and more. Not real places.
Payment and sign-up forms need realistic-looking data to test properly. This generator builds fictional addresses in each country's real format — American ones with states and 5-digit ZIPs, British ones with proper postcode shapes, German with PLZ, Indian with PIN — assembled from common street names and real city-name pools but with invented numbers, so entries don't correspond to actual residences. They are for testing and fiction only: they will pass format validation while never being a real person's address.
Q: Are these real deliverable addresses?
A: No — they combine real format patterns and city names with invented street numbers, so they validate but are not real, deliverable residences.
Q: What is this for?
A: Testing e-commerce/shipping forms, QA fixtures, demos, screenshots and fiction. Not for deceiving services or merchants.
Q: Can I use them to fill my own address?
A: No — never use fake data for real registrations, KYC or anything official; that is fraud. Test and demo use only.
## Fake Person Generator
URL: https://toolfyra.vercel.app/fake-person-generator.html
Category: Developer Tools
Free fake person generator: create complete fictional test profiles — name, birthday, job, email, username, phone format — for QA, demos and fiction. JSON/CSV export.
The faker.js-style workhorse: build a complete fictional person in one click — name, age, birthday, occupation, employer, email pattern, username, height, and a favourite colour for good measure. Everything is randomly assembled from common dictionaries, so profiles look real for validation while matching nobody. Export JSON or CSV to seed databases, or copy single fields. Runs 100% in your browser.
Q: Is any of this data real?
A: No — every field is assembled from generic word and name pools; profiles are designed to pass form validation, not to describe real people.
Q: What are valid uses?
A: QA fixtures, load testing, UI demos, personas for fiction and games. Not impersonation or fraudulent sign-ups.
Q: How do I export?
A: Copy button for plain text; JSON and CSV downloads give you clean structured fixtures.
## Fake Email Generator
URL: https://toolfyra.vercel.app/fake-email-generator.html
Category: Developer Tools
Free fake email generator: create realistic-format placeholder email addresses for testing forms, QA fixtures and demos. Clearly non-functional — not real inboxes.
These are placeholder addresses, not working inboxes. Every generated email uses the reserved example.com domain family (per IETF RFC 2606, reserved for exactly this purpose) with realistic name patterns — so you can test email-field validation, seed fixtures and populate demos with zero risk of mailing a real person. Need a real alias instead? Use the Gmail Alias Generator — that one creates genuinely working addresses.
Q: Do these emails receive mail?
A: No — deliberately. They use RFC-reserved example.com domains that cannot receive email, so tests and demos never touch a real inbox.
Q: Why not give me real disposable inboxes?
A: Disposable-inbox services require servers and are widely blocked by sign-up forms; reserved-domain placeholders are the standard honest choice for testing.
Q: I need an address that actually receives mail — what do I use?
A: The Gmail Alias Generator: plus-tags and dot tricks create unlimited working aliases of your own Gmail.
## Gmail Alias Generator
URL: https://toolfyra.vercel.app/gmail-alias-generator.html
Category: Generators
Free Gmail alias generator: create unlimited WORKING aliases of your Gmail with the plus-tag and dot tricks — track who sold your email, filter like a pro. Real, functional.
Gmail has a built-in superpower: everything after “+” and all dots in the address are ignored. your.name@gmail.com, yourname+shopee@gmail.com and y.o.u.r.n.a.m.e@gmail.com all deliver to the same inbox. That means you can hand every service a unique alias, and when one leaks spam you know exactly who sold it — plus auto-filter or block it with one rule. This generator builds aliases from your real address in your browser only (it is never sent anywhere) and shows the matching filter recipes.
Q: Do these aliases really receive email?
A: Yes — this is official Gmail behaviour, not a hack: plus-tags and dots are ignored for delivery, so every alias lands in your real inbox.
Q: Why would I want different aliases per service?
A: Leak tracing (the tag tells you who leaked it), one-click filtering, and blocking a leaker without changing your main address.
Q: Does it work with Google Workspace?
A: Yes — Workspace accounts follow the same plus-tag rule; some small providers ignore the standard.
Q: Is my email uploaded?
A: No — generation happens entirely in your browser.
## Username Generator
URL: https://toolfyra.vercel.app/username-generator.html
Category: Generators
Free username generator: aesthetic, gaming, professional and cute username ideas for Instagram, TikTok, YouTube, Discord and more — with availability-format checks. Unlimited.
Good handles share four traits: short, pronounceable, consistent across platforms, and keyword-anchored. This generator blends your keyword with curated prefix/suffix sets across six styles — aesthetic (lowercase + dots), gamer (xX, 69, shadow), professional (dot-separated), cute (soft suffixes), creator (verb stems) and random blends — and shows character counts so you can check platform limits. Everything is local; availability must be checked on each platform.
Q: Are these usernames available?
A: They are format-correct ideas — check availability on each platform; popular single words are usually taken, blends rarely are.
Q: What makes a good username?
A: Under 15 characters, easy to say aloud (the radio test), consistent with your other platforms, and anchored to a keyword people might search.
Q: Can I use these for business?
A: Yes — the professional style is built for brands; trademark-check before you register anything commercial.
## Credit Card Validator
URL: https://toolfyra.vercel.app/credit-card-validator.html
Category: Developer Tools
Free credit card validator: check if a card number is structurally valid (Luhn algorithm), detect the brand, and format it correctly — for testing payment forms. No real cards needed.
Payment forms run three checks before ever contacting a bank: length, prefix (BIN/IIN) and the Luhn checksum. This validator runs exactly those: it confirms the number is structurally sound, names the brand (Visa 4…, Mastercard 51–55/2221–2720, Amex 34/37, Discover 6011/65, JCB, UnionPay, Diners), and reformats it in the brand's display grouping. Use it to test your own checkout forms with sandbox numbers — never enter real card numbers here or anywhere you do not fully trust (there is no reason to: no validation happens on your device).
Q: Does this check if a card actually works or has money?
A: No — and no honest tool can. Luhn validation only proves a number is structurally possible; activation and balance checks happen at banks.
Q: Is it safe to paste my real card?
A: Don't paste real card numbers into ANY website you don't need to. For form testing use published sandbox numbers from your payment provider's docs.
Q: Which brands are detected?
A: Visa, Mastercard, American Express, Discover, JCB, Diners Club and UnionPay, plus expected lengths per brand.
## Phone Number Validator
URL: https://toolfyra.vercel.app/phone-number-validator.html
Category: Developer Tools
Free phone number validator: clean, validate and format numbers to E.164 international standard — plus country-code lookup for 20+ countries. For testing and data cleanup.
Every messaging API (Twilio, WhatsApp Business, Firebase) wants numbers in E.164 format: +, country code, subscriber number, no spaces or dashes. This tool cleans human-entered numbers, detects the country from calling codes (US/CA +1, UK +44, UAE +971, PK +92, India +91, Germany +49 and more), runs length sanity checks per region, and outputs the canonical E.164 string plus a pretty international display format. It is a structural validator for testing and data cleanup — it cannot confirm a line is active.
Q: Can this tell me if a number is active/real?
A: No — structural validation only. Line-active checks require carrier lookups (paid APIs, requires consent).
Q: What is E.164 and why care?
A: The international standard: '+' + up to 15 digits. Most SMS/WhatsApp APIs reject anything else — this outputs it automatically.
Q: Which countries are detected?
A: 20+ major calling codes including US/CA, UK, UAE, Saudi, Pakistan, India, Germany, France, Australia, Japan, Brazil, Nigeria.
## Email Validator
URL: https://toolfyra.vercel.app/email-validator.html
Category: Developer Tools
Free email validator: check address syntax (RFC-style), spot disposable-domain signups, and catch typos like gmial.com before they bounce. 100% browser-side.
A bounced email costs a customer. This validator runs the checks that don't need to send anything: RFC-style syntax parsing (local part, @, domain, TLD), typo detection against 30+ popular domains (gmial.com, hotmial.com, yaho.com…), disposable-domain flagging from a maintained blocklist of known throwaway providers, and a clean breakdown of every part. Use it to clean lists before campaigns or to test your sign-up form's validation logic.
Q: Does it send a test email?
A: No — everything is structural analysis in your browser; no email is sent, nothing is stored.
Q: Can it confirm an inbox exists?
A: Not without contacting the mail server (SMTP probing), which most providers throttle or block — syntax+typo checks catch most bad data already.
Q: What are disposable domains?
A: Throwaway inboxes (10-minute-mail style) — flagged so you can decide whether to accept them on your own sign-up forms.
## Body Fat Calculator
URL: https://toolfyra.vercel.app/body-fat-calculator.html
Category: Health & Fitness
Free body fat calculator using the US Navy tape method: measure neck, waist (and hips for women) to estimate body fat percentage, fat mass and lean mass instantly.
Body fat percentage is a far better health signal than weight alone. This calculator implements the US Navy circumference method (the standard field test): log10-based equations using height, neck and waist for men, plus hip for women. You get estimated body fat %, your fat mass vs lean mass in kg/lb, the American Council on Exercise reference ranges (essential → athletic → average → obese) and a simple visual gauge. Tape measurements are estimates — consistency in measuring matters more than perfection.
Q: How accurate is the Navy method?
A: Within ~3-4% of DEXA scans for most people when measurements are careful — good enough to track trends, which matters more than the absolute number.
Q: What is a healthy body fat percentage?
A: For men ~10-20% is typical-healthy, for women ~18-28%. Athletes run lower; essential fat is ~3% (men) and ~12% (women).
Q: Why do women need a hip measurement?
A: Female fat distribution concentrates around hips/thighs; including hip circumference makes the Navy formula significantly more accurate for women.
## Macro Calculator
URL: https://toolfyra.vercel.app/macro-calculator.html
Category: Health & Fitness
Free macro calculator: enter your daily calories and goal (cut, maintain, bulk) to get exact protein, carb and fat gram targets for balanced, low-carb or high-protein diets.
Counting calories without macros is half the job: protein preserves muscle, fats power hormones, carbs fuel training. This calculator converts your calorie target into gram targets (protein 4 kcal/g, carbs 4, fat 9) using evidence-based presets — Balanced 30/40/30, Low-Carb 40/30/30, High-Protein 35/45/20, Keto-style 25/5/70 — plus a fully custom split. Combined with the TDEE calculator for your true calorie needs, this is the complete macro toolkit.
Q: Which preset should I choose?
A: Balanced suits most people; high-protein helps muscle retention on a cut; low-carb/keto only if you actually follow that diet — adherence beats optimization.
Q: Why grams and not percentages?
A: You eat grams, not percentages — the calculator converts so you can type targets straight into MyFitnessPal or similar.
Q: Does protein need depend on body weight?
A: Yes — 1.6–2.2 g/kg is the evidence-based range for active people; use the grams here as a ceiling-aware target.
## Ideal Weight Calculator
URL: https://toolfyra.vercel.app/ideal-weight-calculator.html
Category: Health & Fitness
Free ideal weight calculator: Devine, Robinson and Miller formulas plus the healthy BMI range — get a realistic target weight by height and sex in seconds.
“Ideal weight” began as a drug-dosing calculation, not a beauty standard: the Devine formula (1974) still anchors clinical dosing, with Robinson and Miller as refinements. This calculator shows all three for your height and sex, plus the healthy BMI range (18.5–24.9) — which usually spans 15+ kg. Treat the formulas as reference points: body composition, fitness and how you feel beat any single target number.
Q: Which formula is “right”?
A: None is a truth — they were built for drug dosing. Use them as reference points; the healthy-BMI range is the better everyday guide.
Q: Doesn't muscle make these wrong?
A: Correct — muscular people register “overweight” on BMI. Body composition (see Body Fat Calculator) tells the real story.
Q: Why is the BMI range so wide?
A: Because healthy bodies genuinely vary — 18.5 to 24.9 BMI at 175 cm is roughly 57–76 kg. That range is a feature, not a bug.
## Water Intake Calculator
URL: https://toolfyra.vercel.app/water-intake-calculator.html
Category: Health & Fitness
Free water intake calculator: your daily hydration target based on weight, activity and climate — in glasses, liters and cups. Instant, no sign-up.
The old “8 glasses” rule ignores body size and lifestyle. The evidence-based baseline is ~30–35 ml per kg of body weight, plus ~500–600 ml per hour of exercise and 10–20% more in hot climates. This calculator applies exactly that — including a gymnastic-free adjustment for AC life vs Gulf summers — and converts the target into glasses (250 ml), US cups and common bottle sizes so “drink more water” becomes a countable number.
Q: Is 8 glasses of water a day real?
A: It's a rough folk rule — a 50 kg office worker and 95 kg athlete shouldn't drink the same. Weight + activity based targets are the honest approach.
Q: Does coffee/tea count?
A: Yes — moderate caffeine doesn't dehydrate; soups and fruit count too. The target is total fluid, not plain water only.
Q: Can I drink too much?
A: Rarely, but yes (hyponatremia) — spread intake through the day and don't force liters beyond thirst during heavy drinking challenges.
## Heart Rate Zone Calculator
URL: https://toolfyra.vercel.app/heart-rate-zone-calculator.html
Category: Health & Fitness
Free heart rate zone calculator: max heart rate and all 5 training zones using the accurate Karvonen method (resting HR included) — find your fat-burning and cardio zones.
Generic “220 minus age” charts ignore that hearts differ. This calculator uses the Tanaka formula (208 − 0.7 × age) for max heart rate and the Karvonen method, which builds zones from your heart-rate reserve (max − resting) — measurably more personal than plain percentages. You get all five zones (warm-up, fat burn, aerobic/cardio, hard/threshold, VO2 max) in bpm, with plain-English notes on what each feels like and what it trains. Also flag your real fat-burning window honestly: it's broad (about zones 2–3) — total energy expenditure matters more than staying in a magic band.
Q: Why Karvonen instead of simple percentages?
A: Karvonen uses your heart-rate reserve including resting HR, so zones fit YOUR heart — two 30-year-olds with different fitness get different Zone 2 ranges.
Q: Which zone burns the most fat?
A: Percent-of-calories-from-fat peaks around Zone 2-3, but total calories burned matters for fat loss — hard intervals and long easy runs both work.
Q: How do I measure resting heart rate?
A: Pulse for 60 seconds right after waking, several mornings, average the results. Fitbits/Apple Watch work too.
## One Rep Max Calculator
URL: https://toolfyra.vercel.app/one-rep-max-calculator.html
Category: Health & Fitness
Free 1RM calculator: estimate your one-rep max from any weight × reps set using Epley and Brzycki formulas, plus a full percentage training chart. Lift smarter, test safer.
Actual 1RM attempts are the riskiest lifts in the gym. The smarter way: take a hard set of 1–10 reps and estimate the max with the two validated formulas — Epley (w × (1 + reps/30)) and Brzycki (w × 36/(37 − reps)), which agree closely under 10 reps. You also get the percentage chart powerlifters program with: 90% for heavy singles, 80% for strength, 70% for hypertrophy volume, 60% for speed work — so the estimate turns directly into a training plan.
Q: How accurate is a calculated 1RM?
A: Within a few percent when based on a true hard set under 10 reps — accuracy drops for high-rep sets (muscular endurance skews the math).
Q: Why estimate instead of testing for real?
A: Real 1RM attempts are injury-risk moves with fatigue costs; estimating from reps gives 95% of the information at 10% of the risk.
Q: What percentage should I train at?
A: Strength ≈ 80–90% for low reps, hypertrophy ≈ 65–80% for 6–12 reps, endurance ≤ 65% — the chart maps it all from your max.
## Blood Pressure Checker
URL: https://toolfyra.vercel.app/blood-pressure-range-checker.html
Category: Health & Fitness
Free blood pressure checker: enter systolic & diastolic readings to see your AHA category — normal, elevated, stage 1 or 2 hypertension — with clear next-step guidance.
Blood pressure is two numbers: systolic (artery pressure during a beat) over diastolic (between beats), measured in mmHg. This checker classifies any reading into the five American Heart Association categories — Normal (<120/<80), Elevated, Hypertension Stage 1, Stage 2, and Hypertensive Crisis — using the rule AHA actually uses (whichever number pushes you into a higher category wins). You get what each category means, home-monitoring tips that prevent false alarms, and honest red flags: this is education, not diagnosis — high readings need a clinician.
Q: What is a normal blood pressure?
A: Under 120 systolic AND under 80 diastolic is normal; 120-129 systolic is “elevated”; 130+/80+ starts hypertension stages per current AHA guidelines.
Q: My reading was high once — panic?
A: No — BP swings with sleep, stress, coffee and even a full bladder. Categories need consistent readings across days; a single high number is a reminder to re-measure, not a diagnosis.
Q: When is it an emergency?
A: Readings above 180/120 — especially with chest pain, shortness of breath, vision or speech changes — need immediate medical care. This tool flags it, but act first, browse later.
## Sleep Cycle Calculator
URL: https://toolfyra.vercel.app/sleep-cycle-calculator.html
Category: Health & Fitness
Free sleep cycle calculator: wake up between sleep cycles, not mid-dream. Enter bedtime or wake time to find the best times based on 90-minute sleep cycles.
Sleep moves in ~90-minute cycles through light, deep and REM stages — waking mid-deep-cycle causes sleep inertia (that hangover-without-the-fun feeling). This calculator works both directions: given a bedtime it lists the wake times completing 3–6 full cycles, and given a wake time it lists the bedtimes that fit whole cycles, plus the ~15-minute fall-asleep buffer. It uses the widely-cited average cycle length — real cycles vary 80–100 minutes per person — so treat results as targets to experiment with, plus the honest baseline advice: consistent times beat clever math.
Q: Are sleep cycles really 90 minutes?
A: It's a useful average — individuals range ~80–100 minutes and it varies by night. Use the times as experiments, not laws.
Q: Why do I still feel groggy after 8 hours?
A: Likely you woke mid-deep-sleep. Shifting wake time by 15–45 minutes to land between cycles often fixes it — that's exactly what this tool finds.
Q: What about naps?
A: ~20 minutes (pre-deep-sleep) or a full 90-minute cycle; 30–60 minute naps land you in the groggy middle.
## Video Ideas Generator
URL: https://toolfyra.vercel.app/video-ideas-generator.html
Category: Social & Video
Free video ideas generator: paste a YouTube/TikTok link or topic and get 15 same-niche video ideas with hooks and formats — sequels, myths, mistakes, challenges and more.
Every viral channel runs on repeatable formats: sequels, myth-busting, mistakes, challenges, comparisons, reactions. This generator takes one seed video (link or topic) and rotates it through 15 proven formats — each idea includes the format name, a ready hook line, and an effort tag so you can batch low-effort ideas on slow days. Works for YouTube, TikTok, Reels, Shorts and blog video. 100% in-browser.
Q: How does the link mode work?
A: It fetches the video's public title via the platform's official oEmbed API and uses it as the topic seed — nothing else is accessed.
Q: Are the ideas the same every time?
A: No — formats are proven but the mix and hooks vary per generation; regenerate for a fresh batch.
Q: Does it work for any niche?
A: Yes — vlogs, tutorials, gaming, fitness, finance, cooking: the 15 formats are platform-universal.
## Video Copier Blueprint
URL: https://toolfyra.vercel.app/video-copier-blueprint.html
Category: Social & Video
Free video copier blueprint: paste a video link, get the full remake structure — hook formulas, beat-by-beat script skeleton, shot list, title variants, hashtags and AI-video prompts.
Winning videos share a structure: a 3-second hook, value beats, a proof moment and one CTA. This tool turns any video (link or title) into that structure as a shootable blueprint — script skeleton with timings, shot/b-roll list, title and thumbnail variants, hashtags and even scene prompts for AI video generators. Honest note: it reverse-engineers the format (public metadata + proven patterns), not the actual content — your footage, facts and personality make it original, not a copy.
Q: Does it copy the actual video content?
A: No — and that would be plagiarism. It rebuilds the structural skeleton (timing, format, hooks) from public metadata and proven patterns; the content you fill in is yours.
Q: What are the AI-video prompts for?
A: Each blueprint includes 3 scene prompts you can paste into Sora, Kling, Runway or Pika to generate b-roll for your remake.
Q: Is it free?
A: Yes — unlimited blueprints, no sign-up, nothing leaves your browser.
## Video to Prompt Generator
URL: https://toolfyra.vercel.app/video-to-prompt-generator.html
Category: Generators
Free video-to-prompt generator: describe or paste a video reference and get 6 production-ready AI video prompts with style, camera, lighting and model-specific parameters.
AI video generators live and die by prompt quality. This builder converts a video reference — a pasted link whose title sets the theme, or your own description — into six scene-type prompts: establishing wide, subject medium, close-up detail, action moment, emotional beat and closing shot. Each includes subject, style, camera move, lighting and quality tokens, plus model-specific parameter notes (duration, aspect ratio) and a shared negative prompt. Copy into Sora, Kling, Runway, Pika or Luma and iterate.
Q: Does it download or watch the actual video?
A: No — it uses the public title as a theme seed (or your description). The prompts are built from professional cinematography patterns, honestly labeled.
Q: Which models do the prompts work with?
A: Sora, Kling, Runway Gen-3, Pika and Luma — parameters like duration and aspect-ratio are noted per model.
Q: Why a negative prompt?
A: AI video models commonly add warping, text artifacts and extra limbs — a shared negative prompt reduces these failures.
## Multi-Prompt Generator
URL: https://toolfyra.vercel.app/ai-multi-prompt-generator.html
Category: Generators
Free multi-prompt generator: one topic in, a consistent 8-scene prompt set out — same style tokens across scenes so your AI video feels like one film, not 8 clips.
Chained AI clips look amateur when each scene invents its own style. The fix is a locked style block: identical style, lighting and camera tokens repeated in every scene prompt, with only subject and action changing. This generator builds that — 8 scenes forming a mini-story arc (establish → introduce → build → turn → resolve), each prompt carrying the same DNA, plus a suggested seed word and per-model consistency tips. Paste into Sora/Kling/Runway in order.
Q: Why do my AI clips look like different films?
A: Because each prompt described style differently — shared, verbatim style tokens across prompts are the standard fix for clip-to-frame consistency.
Q: What is a story arc in 8 scenes?
A: Establish location → introduce subject → first detail → action build → turning moment → reaction → resolution → closing wide. It keeps viewers watching.
Q: Which aspect ratios are covered?
A: 16:9, 9:16 and 1:1 — noted in every prompt header.
## Slideshow Video Maker
URL: https://toolfyra.vercel.app/slideshow-video-maker.html
Category: Social & Video
Free slideshow video maker: turn photos and text into a real video file in your browser — set durations, title & end cards, optional music — download WebM instantly. No upload.
This is a real video creator, not a mockup: it renders your photos on a canvas at 30fps and records it with the browser's MediaRecorder — producing an actual WebM video file with your timing, title card, end card and optional music track. Choose landscape (YouTube), vertical (Shorts/TikTok/Reels) or square; images are cover-fitted automatically. Everything renders on your device — photos are never uploaded, and there is no watermark because there is no server.
Q: What format is the output?
A: WebM (VP9/VP8) — plays everywhere and uploads directly to YouTube, TikTok and Instagram; most editors also accept it. (Browsers don't export MP4 directly; converters exist if you specifically need MP4.)
Q: Can I add music?
A: Yes — pick an audio file and it is mixed into the recorded video. Use royalty-free tracks for public posts.
Q: Why does recording take as long as the video?
A: Rendering happens in real time at 30fps in your browser — a 10-second slideshow records in ~10 seconds. Keep the tab visible while it records.
Q: Are my photos uploaded anywhere?
A: No — canvas rendering and recording are 100% local.
## Debt Payoff Coach
URL: https://toolfyra.vercel.app/debt-payoff-coach.html
Category: Money & Business
Free debt payoff coach: track debts, see your debt-free date, compare snowball vs avalanche, get smart guidance, milestone tracking and WhatsApp progress sharing — 100% private, in your browser.
This is the coaching core of a full debt-payoff app, running entirely in your browser: add debts (balance, APR, minimum payment, due day), log payments, and the coach computes your debt-free date under three strategies — Snowball (smallest first, fastest motivation), Avalanche (highest APR first, least interest) and a Hybrid — with an extra-payment slider showing exactly how many months and how much interest each choice saves. The built-in guidance panel answers the real questions with your actual numbers: which debt to attack, what interest is burning daily, word-for-word rate-negotiation scripts, income-boost and spending-cut playbooks, credit-score quick wins, tax notes and emergency steps. Share progress or payment reminders to WhatsApp (or any messenger) with one tap. Data lives in your browser's local storage — there is no account and nothing is uploaded.
Q: Is my financial data sent anywhere?
A: No — everything is computed and stored in your browser (local storage). Clearing site data erases it; there is no account or server.
Q: Snowball or Avalanche — which should I pick?
A: Avalanche mathematically minimizes interest; snowball's early wins keep humans motivated. The best method is the one you stick to — the coach shows both side by side.
Q: How does the WhatsApp sharing work?
A: It opens WhatsApp (web or app) with a pre-formatted progress report or reminder text addressed to any number you enter — you press send. Nothing is sent automatically.
Q: Is this financial advice?
A: It's an educational calculator with coaching frameworks — for decisions about loans, settlements or legal matters, consult a licensed professional.
## Hourly to Salary Converter
URL: https://toolfyra.vercel.app/hourly-to-salary-converter.html
Category: Money & Business
Free hourly to salary converter: hourly rate × hours × weeks = annual, monthly and weekly pay — overtime note included. Reverse mode too.
The standard conversion assumes 40 hours × 52 weeks = 2,080 paid hours — but part-time, seasonal and shift workers should change the numbers. The reverse mode is just as useful: given a salary offer, see the real hourly equivalent so you can compare against contract or gig rates.
Q: How do I convert $25/hour to salary?
A: $25 × 40 × 52 = $52,000/year (≈ $4,333/month). Adjust hours/weeks for part-time patterns.
Q: Does it include overtime or taxes?
A: No — gross pay only. Use the Overtime Pay and Paycheck Estimator tools for those.
## Paycheck Estimator
URL: https://toolfyra.vercel.app/paycheck-estimator.html
Category: Money & Business
Free US paycheck estimator: salary minus estimated federal, state, FICA and pre-tax deductions — see weekly, biweekly and monthly take-home. Rates editable for accuracy.
US take-home pay = gross minus FICA (7.65%: Social Security 6.2% + Medicare 1.45%), federal income tax (depends on bracket, filing status and W-4), state tax (0% in TX/FL/WA… to 13.3% in CA) and pre-tax deductions like 401(k) and health premiums. This estimator uses your editable rates on the post-deduction taxable amount — accurate enough for budgeting; exact withholding depends on your W-4, so verify against your first payslip.
Q: Why is my real paycheck different?
A: W-4 settings, local taxes and benefit plans vary — this is an estimate; adjust the rates until it matches your payslip, then trust it.
Q: What is FICA?
A: Social Security 6.2% + Medicare 1.45% = 7.65% of gross, up to the annual SS wage base — it is fixed, not editable guesswork.
## Overtime Pay Calculator
URL: https://toolfyra.vercel.app/overtime-pay-calculator.html
Category: Money & Business
Free overtime pay calculator: regular + 1.5x + double-time breakdown for daily and weekly hours — see exactly what your extra hours are worth before you work them.
US federal law (FLSA) requires 1.5× your regular rate over 40 hours/week; several states (California most famously) also require daily overtime over 8 hours and double time over 12. This calculator splits your hours into regular, time-and-a-half and double-time so you can verify your payslip or price an extra shift before saying yes.
Q: Do salaried workers get overtime?
A: Exempt salaried roles generally do not; non-exempt salaried do. Check your classification — misclassification is a common payroll error.
Q: Is holiday pay 2x by law?
A: Federal law does not require premium pay for weekends/holidays — that is employer policy or union contract, not FLSA.
## Bonus Tax Calculator
URL: https://toolfyra.vercel.app/bonus-tax-calculator.html
Category: Money & Business
Free bonus tax calculator: see how a bonus is taxed two ways — the 22% federal supplemental flat rate vs adding it to your salary — plus FICA and state estimates.
The IRS lets employers withhold bonus tax two ways: a flat 22% supplemental rate, or the aggregate method (bonus added to your regular paycheck, withholding at your W-4 rate). Either way the final tax settles at your real bracket at filing — big bonuses can push marginal income into higher brackets, but the bonus itself is never “taxed at 50%” no matter what your payslip implied. This calculator shows both methods plus FICA and editable state.
Q: Why did my bonus feel taxed so hard?
A: Withholding ≠ final tax. Over-withheld tax comes back as a refund — check with the aggregate view here, then your actual return.
Q: Can I avoid the 22% hit?
A: Contribute bonus dollars to a pre-tax 401(k) before payroll runs it — lowers both taxable income and withholding.
## Sales Tax Calculator
URL: https://toolfyra.vercel.app/sales-tax-calculator.html
Category: Money & Business
Free sales tax calculator: add tax to a pre-tax price or remove tax from a total (reverse mode) — with quick presets for common US state rates.
US sales tax is set by state + county + city + special districts — the same purchase can be 0% (OR, MT, NH, DE) or over 10% (parts of CA/LA/TN). Add mode computes tax on a price; reverse mode extracts the tax portion already inside a total — the math every small business and shopper eventually needs.
Q: How do I remove tax from a total?
A: Divide the total by (1 + rate). $108.25 at 8.25% → $108.25 ÷ 1.0825 = $100 pre-tax. The reverse mode does this for you.
Q: Why does my city's rate differ?
A: Local add-ons stack on the state rate — look up the combined rate for your exact address for perfect accuracy.
## Capital Gains Estimator
URL: https://toolfyra.vercel.app/capital-gains-estimator.html
Category: Money & Business
Free capital gains estimator: buy/sell price, holding period, and estimated US tax — 0%/15%/20% long-term brackets vs short-term ordinary rates, with editable rates.
US capital gains: held over 1 year = long-term at 0/15/20% (by income) + possible 3.8% NIIT over $200k; held under = short-term, taxed as ordinary income (10–37%). The difference on a $50k gain can exceed $5,000 — this estimator shows both scenarios side by side with editable rates so it stays honest as your bracket changes.
Q: Which long-term rate applies to me?
A: 0% up to ~$47k taxable (single), 15% middle incomes, 20% above ~$518k — plus 3.8% NIIT above $200k MAGI. Adjust the rate field to yours.
Q: Do losses help?
A: Yes — losses offset gains first, then up to $3,000/yr of ordinary income; the rest carries forward.
## 401k Growth Calculator
URL: https://toolfyra.vercel.app/401k-growth-calculator.html
Category: Money & Business
Free 401k growth calculator: contribution + employer match projected to retirement with compound growth — shows the 2026 IRS limit ($24,500, $32,500 age 50+) in context.
A 401(k) compounds three ways: your contributions, your employer match (free money — up to 3–6% of salary at typical employers), and market growth. The 2026 IRS employee limit is $24,500 ($32,500 with the 50+ catch-up, $35,750 at 60–63). This projection uses annual compounding on your combined contribution until your retirement age — and shows exactly how much of the final number is match money you'd be crazy to leave.
Q: What is the 2026 401k limit?
A: Employee elective deferral $24,500; +$8,000 catch-up at 50+ (total $32,500); +$11,250 super catch-up at 60–63; combined employee+employer ceiling $70,000–$78,000 by age.
Q: How much should I contribute?
A: At minimum: the full employer match (it's a 50–100% instant return). Target 15% of gross including match for a solid retirement.
## Roth vs Traditional Calculator
URL: https://toolfyra.vercel.app/roth-vs-traditional-calculator.html
Category: Money & Business
Free Roth vs Traditional calculator: same contributions, different tax timing — see which leaves you more after-tax money at your expected retirement bracket.
Both accounts grow tax-free — the only difference is when you pay tax. Traditional saves tax at your current (usually higher) working bracket; Roth locks in today's tax and every dollar of growth comes out tax-free. Rule of thumb baked into this calculator: higher bracket now → Traditional; lower bracket or early career → Roth; the comparison outputs equal after-tax wealth, and the winner is decided by your two bracket inputs.
Q: Can I split between both?
A: Yes — many plans allow it, and diversifying tax treatment hedges future tax-law changes.
Q: Does this include RMDs or backdoor strategies?
A: No — this is the core contribution-timing comparison; talk to a tax pro about advanced moves.
## Social Security Claiming Calculator
URL: https://toolfyra.vercel.app/social-security-claiming-calculator.html
Category: Money & Business
Free Social Security calculator: see your estimated monthly benefit at every claiming age 62–70 — early reduction vs delayed retirement credits, lifetime totals compared.
Claim at 62 and your benefit is cut about 30% below Full Retirement Age (67 for most); every year you delay past FRA adds 8% in delayed retirement credits up to 70 (+24%). Monthly-vs-lifetime math depends heavily on lifespan — this calculator shows monthly benefits at each age AND cumulative lifetime totals so the break-even (~80–83) is visible, not guessed.
Q: When should I claim?
A: Poor health or need → earlier often wins. Expecting a long life or can bridge income → 70 maximizes the monthly check for life (and survivor benefits).
Q: What is my FRA benefit?
A: Your 35 highest-earning years feed it — check your exact number at ssa.gov (My Social Security account), then plug it in here.
## Mortgage Affordability Calculator
URL: https://toolfyra.vercel.app/mortgage-affordability-calculator.html
Category: Money & Business
Free mortgage affordability calculator: income and debts in, maximum home price out — the 28/36 rule lenders use, with down payment, rate and term editable.
Lenders size your mortgage with the 28/36 rule: housing costs (PITI — principal, interest, taxes, insurance) ≤ 28% of gross income, and total debt payments ≤ 36%. This calculator runs the math from your income, monthly debts, down payment, rate and term, then shows the approved-price estimate — plus a “comfortable” version at 25% for people who like sleeping well.
Q: What counts in the 36%?
A: All monthly debt: car loans, student loans, credit-card minimums, plus the new housing payment.
Q: Is 28% the same as what I should spend?
A: It is the approval ceiling, not advice — many buyers are happier 5 points under it, which is why the comfortable number is shown.
## Closing Cost Estimator
URL: https://toolfyra.vercel.app/closing-cost-estimator.html
Category: Money & Business
Free closing cost estimator: loan price in, estimated buyer closing costs out — origination, title, appraisal, escrow, points — with the typical 2–5% range explained.
US buyer closing costs average 2–5% of the loan: loan origination (0.5–1%), appraisal ($500–800), title insurance + search (~0.5–1%), escrow prepaids (insurance + tax deposits), recording fees and optional points. This estimator gives the range on your price and itemizes typical amounts so you can compare Loan Estimates line by line.
Q: Can I reduce closing costs?
A: Yes — shop title insurance (legal in most states), negotiate seller concessions, and compare at least 3 Loan Estimates; lender fees vary widely.
Q: Are closing costs tax-deductible?
A: Mostly no for buyers — though prepaid mortgage interest (points) often is. Ask a CPA for your case.
## Refinance Break-Even Calculator
URL: https://toolfyra.vercel.app/refinance-break-even-calculator.html
Category: Money & Business
Free refinance break-even calculator: old vs new payment and closing costs — see exactly how many months until the refinance pays for itself, and if it's worth it.
Refinancing makes sense only when monthly savings recover the closing costs before you move or repay: $2,500 in costs ÷ $180/month saved ≈ 14 months to break even. This calculator runs that math and flags the verdict — including the often-ignored catch that a new 30-year term can still cost more lifetime interest even at a lower rate.
Q: What is a good break-even period?
A: Commonly cited rule: under 24–36 months is attractive; if you might move sooner, be skeptical.
Q: Do refi costs differ from purchase closing costs?
A: They are lower (2–3% typical) — no transfer taxes usually, but appraisal/origination/title still apply.
## Rent Affordability Calculator
URL: https://toolfyra.vercel.app/rent-affordability-calculator.html
Category: Money & Business
Free rent affordability calculator: income in, max rent out — the 3x gross rule landlords use, the 30% budget rule, and what's left for everything else.
Two standards rule renting: the landlord's 3× rule (gross income must be triple the rent) and the budgeter's 30% rule (rent ≤ 30% of gross income). They disagree on purpose — one protects the landlord, one protects you. This calculator shows the ceiling each allows, plus a lean 25% target with the monthly dollars left over for savings.
Q: Is the 3x rule on gross or net income?
A: Almost always gross (pre-tax) — which is why apartments that pass the rule can still feel unaffordable on net pay.
Q: What if I have big debts?
A: Then 30% gross is too high — budget from net income instead and keep total debt payments under 36%.
## Rent vs Buy Calculator
URL: https://toolfyra.vercel.app/rent-vs-buy-calculator.html
Category: Money & Business
Free rent vs buy calculator: monthly rent vs owning costs (mortgage, tax, insurance, maintenance) over your planned years — with the honest 1% maintenance rule.
Owning costs more than the mortgage: add property tax (~1–2%/yr), insurance, maintenance (budget 1% of home value yearly) and opportunity cost of the down payment. Renting costs rent plus annual increases. This calculator compares honest monthly totals over your planned stay — the common wisdom (buy if staying 5+ years, rent if shorter) emerges from the numbers rather than a slogan.
Q: Is renting really throwing money away?
A: No — you're buying flexibility and zero-maintenance living. The equivalent owner “wastes” money on interest, taxes, insurance and repairs.
Q: How many years until buying wins?
A: Typically 4–7 years at normal appreciation and selling costs (~8–10% of price in commissions+fees) — the horizon field shows your case.
## Auto Loan Calculator
URL: https://toolfyra.vercel.app/auto-loan-calculator.html
Category: Money & Business
Free auto loan calculator: car price, trade-in, sales tax, down payment, rate and term — monthly payment, total interest and the honest 20/4/10 affordability check.
A car payment is price − down payment − trade-in, plus sales tax on the difference (in most states), financed at the rate for the term. The classic affordability check is 20/4/10: 20% down, loan ≤ 4 years, total transport ≤ 10% of gross income. This calculator outputs the payment and how far the deal sits from that rule.
Q: Should I finance through the dealer?
A: Compare — dealer markup on rates is common; a credit-union pre-approval is your negotiating baseline.
Q: Is a 72–84 month loan ever smart?
A: Rarely — negative equity for years and heavy interest; the 20/4/10 verdict will say so honestly.
## Lease vs Buy Calculator
URL: https://toolfyra.vercel.app/lease-vs-buy-calculator.html
Category: Money & Business
Free lease vs buy calculator: compare 3-year total cost of leasing vs buying the same car — payments, down, sale value, and who each option actually suits.
Leasing buys depreciation you use plus rent charges; buying buys the whole asset and you recover part at sale. Over the same 3 years, leasing is usually $1–3k cheaper in cash flow but ends with nothing; buying costs more monthly but builds trade-in value. This calculator totals both paths from your real quotes and states which suits your pattern (drive a lot → buy; want newest car under warranty → lease).
Q: Why does leasing look cheaper here?
A: Because you only pay for 3 years of depreciation, not the whole car — but you never stop paying if you always lease.
Q: What about mileage limits?
A: Leases charge $0.15–0.30 per mile over the cap (usually 10–12k/yr) — high-mileage drivers should buy.
## Car Depreciation Calculator
URL: https://toolfyra.vercel.app/car-depreciation-calculator.html
Category: Money & Business
Free car depreciation calculator: see your car's estimated value year by year — the 20%-year-one then ~15% curve, with a total-loss table insurers actually use.
Depreciation is a new car's biggest cost — typically ~20% the first year, then 12–15% annually, with luxury models falling faster. This calculator projects values on that standard curve and shows cumulative loss — the reason “gently used 2–3 year old” cars are the classic value buy, and why gap insurance matters in year one.
Q: Which cars hold value best?
A: Historically Toyota/Lexus/Honda trucks and SUVs — check 5-year residual tables (iSeeCars/KBB) for the current list.
Q: How do I slow depreciation?
A: Low miles, garage keep, full service records, popular color, no modifications — and never buy the priciest trim.
## UK Take-Home Calculator
URL: https://toolfyra.vercel.app/uk-take-home-calculator.html
Category: Money & Business
Free UK salary calculator: gross to take-home with 2026/27 income tax bands (£12,570 allowance) and National Insurance — monthly, weekly, and hourly views.
UK pay slips reduce gross by Income Tax (Personal Allowance £12,570, then 20/40/45% bands) and National Insurance (8% between £12,570 and £50,270, 2% above — employee rates). This calculator applies both with the pension-salary-sacrifice reduction, showing monthly, weekly and daily take-home. Scotland uses different bands — set your income tax there manually if needed.
Q: Are these the 2026/27 rates?
A: Yes — England/Wales/NI: allowance £12,570, basic 20% to £50,270, higher 40% to £125,140, additional 45% above. Always confirm on gov.uk — rates change each April.
Q: Why is my payslip different?
A: Student loans, pension %, benefits-in-kind and Scottish bands change it — this is the standard-tax-code baseline.
## UK Stamp Duty Calculator
URL: https://toolfyra.vercel.app/uk-stamp-duty-calculator.html
Category: Money & Business
Free UK Stamp Duty Land Tax calculator: price in, SDLT out — current England/NI bands, first-time-buyer relief context and the +5% second-home surcharge.
Stamp Duty Land Tax is charged in bands — each slice of the price is taxed at its band rate (post-2025 standard: 0% to £125k, 2% to £250k, 5% to £925k, 10% to £1.5m, 12% above). Buying a second home or buy-to-let adds +5% on every band. This calculator shows the slice-by-slice breakdown so you can verify any online quote. Scotland (LBTT) and Wales (LTT) have different bands.
Q: Do first-time buyers pay less?
A: Reliefs have changed repeatedly (full relief ended for homes over £500k in 2025 terms) — confirm the current FTB threshold on gov.uk before relying on it.
Q: When is SDLT paid?
A: Within 14 days of completion, filed by your solicitor — late payment draws penalties and interest.
## UK Mileage Allowance Calculator
URL: https://toolfyra.vercel.app/uk-mileage-allowance-calculator.html
Category: Money & Business
Free UK mileage calculator: AMAP rates (45p first 10,000 miles, 25p after) — business miles value, employer reimbursements gap, and the Mileage Allowance Relief you can claim.
If you drive your own car for work, HMRC's Approved Mileage Allowance Payments are 45p/mile up to 10,000 miles, 25p thereafter. Employers can pay less; the shortfall becomes Mileage Allowance Relief, claimed via self-assessment (or P87 form). This calculator computes the approved amount, the gap, and the tax-relief value at your bracket.
Q: Do the rates include fuel?
A: Yes — 45p/25p covers fuel, wear and insurance for a car. Separate flat rates exist for motorcycles (24p) and bikes (20p).
Q: What if my employer pays the full 45p?
A: Then there's nothing to claim — relief applies only to the shortfall below approved amounts.
## UK Inheritance Tax Calculator
URL: https://toolfyra.vercel.app/uk-inheritance-tax-calculator.html
Category: Money & Business
Free UK IHT calculator: estate value, home left to children, spouse context — nil-rate band £325k + residence allowance £175k, 40% above, with the pass-to-spouse note.
UK Inheritance Tax charges 40% on estate value above the available bands: the £325,000 nil-rate band, plus the £175,000 residence nil-rate band when a home goes to children/grandchildren (tapered away above £2m). Everything left to a spouse passes free, and unused bands transfer to the survivor — so couples typically shelter £1m. This estimator shows the per-person picture; trusts, gifts-in-7-years and business relief need professional advice.
Q: Is IHT due on everything I leave?
A: No — most estates pay nothing: combined couple allowances reach £1m, and spouses are exempt. Roughly 4–7% of UK deaths trigger IHT.
Q: Can I avoid IHT by gifting?
A: Gifts become exempt if you survive 7 years after giving (with tapering relief years 3–7) — the '7-year rule'. Annual £3,000 gift allowance is immediately exempt.
## Canada Take-Home Calculator
URL: https://toolfyra.vercel.app/canada-take-home-calculator.html
Category: Money & Business
Free Canadian salary calculator: gross to take-home with federal brackets, basic personal amount, CPP and EI premiums — provincial tax as editable estimate.
Canadian pay slips deduct federal tax (15% up to ~$57k, rising to 33% above ~$253k, after the ~$16k basic personal amount), provincial tax (varies wildly — ON ~5–20%, AB 10–15%), CPP (5.95% between $3,500 and ~$68,500) and EI (~1.6% to the max premium). This calculator runs federal + CPP + EI exactly and provincial as one editable rate — accurate enough for offers and budgeting.
Q: Why is provincial tax just one field?
A: Provinces each run full bracket systems; a single effective rate covers budgeting needs — set it from your province's first brackets (~5–10% for most incomes).
Q: What is the CPP max per year?
A: CPP contributions cap near $4,000/year (2025-ish values) — the calculator caps automatically; high earners see it stop.
## Australia Take-Home Calculator
URL: https://toolfyra.vercel.app/australia-take-home-calculator.html
Category: Money & Business
Free Australian salary calculator: gross to take-home with stage-3 tax rates, Medicare levy and the tax-free threshold — fortnightly and monthly views.
Australian residents get a $18,200 tax-free threshold, then pay 16/30/37/45% through the brackets, plus the 2% Medicare levy (reduced for low incomes). Employers also pay 12% superannuation on top of your salary — it is extra, not deducted. This calculator shows annual, monthly and fortnightly take-home on the standard rates; HECS/HELP repayments and private-health adjustments need adding separately.
Q: Is superannuation included?
A: No — super (12% in 2025-26) is paid by your employer on top of gross. This calculator shows your cash take-home.
Q: Do I claim the tax-free threshold from one employer only?
A: Yes — claim it from your main employer; a second job gets taxed at the top rate from dollar one until you lodge.
## FIRE Number Calculator
URL: https://toolfyra.vercel.app/fire-number-calculator.html
Category: Money & Business
Free FIRE calculator: annual expenses × 25 = your FIRE number, plus years-to-FI from your savings rate — lean, regular and fat FIRE at a glance.
Financial Independence, Retire Early rests on the 4% safe-withdrawal rule: a portfolio of 25× annual expenses can historically fund withdrawals forever. Your savings rate — not your income — decides the timeline: saving 50% of income points to ~17 years, 25% to ~32 years (standard 5% real-return math). This calculator outputs your FIRE number, progress so far and projected years-to-FI across lean/regular/fat flavours.
Q: Is the 4% rule safe?
A: It comes from the Trinity Study — historically ~95% success over 30-year retirements; early retirees often plan 3.5% for extra margin.
Q: What counts as annual expenses?
A: Everything you'd spend in retirement: housing, food, health cover, travel — gross of any side income you'd keep.
## Withdrawal Rate Calculator
URL: https://toolfyra.vercel.app/withdrawal-rate-calculator.html
Category: Money & Business
Free withdrawal rate calculator: portfolio in, sustainable annual and monthly income out — 3%, 3.5% and 4% rules compared with success-rate context.
The 4% rule (Trinity Study) says withdrawing 4% of a balanced portfolio in year one — then inflation-adjusting — historically survived 30-year retirements ~95% of the time. Early retirees and cautious planners often use 3–3.5% for longer horizons. This calculator converts your portfolio into yearly and monthly income under each rate, so 'can I live off this' becomes arithmetic instead of anxiety.
Q: Why not withdraw more if returns are good?
A: Sequence risk: early bad years plus high withdrawals permanently damage a portfolio — lower rates are the insurance.
Q: Does the 4% include taxes?
A: No — withdrawals from traditional accounts are taxable; plan gross income around your tax bracket.
## Retirement Drawdown Calculator
URL: https://toolfyra.vercel.app/retirement-drawdown-calculator.html
Category: Money & Business
Free retirement drawdown calculator: savings, annual spending, returns and inflation — see how many years your money lasts, with an editable return assumption.
Drawdown math is simple and brutal: withdrawals + inflation vs returns decide longevity. This calculator runs your portfolio down year by year at your real (inflation-adjusted) return and reports the survival age — plus the balance at key milestones. It is the honest companion to the Withdrawal Rate tool: one plans the rate, this one shows the timeline.
Q: What return should I assume?
A: Use a real (after-inflation) 4–5% for a balanced portfolio — optimistic inputs create fake safety.
Q: Does this include taxes or super/pension income?
A: No — net figures in, gross spending plans; layer pension/annuity income by reducing your withdrawal amount.
## Cooking Unit Converter
URL: https://toolfyra.vercel.app/cooking-unit-converter.html
Category: Calculators
Free cooking converter: cups, tablespoons, teaspoons, fluid ounces, milliliters and grams (by ingredient density) — US/UK recipe conversions in one click.
US recipes measure by volume (1 cup = 16 tbsp = 237 ml), most of the world measures by weight — and ingredients differ: 1 cup of flour ≈ 120g but 1 cup of sugar ≈ 200g. This converter handles the volume ladder instantly and converts 10 common baking ingredients cup-to-gram correctly, ending the flour-vs-scale guessing game for good.
Q: How many grams is a cup of flour?
A: About 120g for all-purpose flour (scoop-and-level), 200g for granulated sugar, 227g for butter — pick the ingredient in the tool.
Q: Are US and UK cups the same?
A: US cup = 237ml, UK/metric cup = 250ml — a 5% difference that matters in baking; this tool uses US cups with a metric toggle.
## Unit Price Comparator
URL: https://toolfyra.vercel.app/unit-price-comparator.html
Category: Calculators
Free unit price comparator: compare two pack sizes and prices — which is actually cheaper per 100g/oz/unit, including the bulk-buy verdict.
Shrinkflation and shelf psychology make unit prices the only honest comparison: price ÷ real quantity. This tool compares two packs in g, kg, oz, lb, ml, l or plain units and declares the winner — useful everywhere from cereal aisles to Amazon multi-packs and Costco runs.
Q: Is bigger always cheaper?
A: No — sometimes small packs are on sale below the bulk per-unit price; that's exactly what this catches.
Q: What about quality differences?
A: Unit price only compares quantity — use it within the same product family where quality is comparable.
## Pet Cost Calculator
URL: https://toolfyra.vercel.app/pet-cost-calculator.html
Category: Calculators
Free pet cost calculator: food, vet, insurance, grooming and boarding for dogs and cats — the honest first-year and ongoing costs before you adopt.
US pet owners spend roughly $1,400–$4,000/year on a dog and $900–$2,500 on a cat — food and routine vet are just the base; insurance (~$30–70/mo dogs), grooming, boarding ($40–75/night) and the surprise $2,000 emergency fund decide the real number. This calculator totals your inputs, shows first-year extras (shots, neutering, supplies), and converts it to a monthly amount you can budget.
Q: Should I get pet insurance?
A: Rule of thumb: if a surprise $3,000 vet bill would hurt, insurance (~$400–800/yr) or a dedicated savings fund is worth it.
Q: What are the biggest hidden costs?
A: Emergency vet bills (average $800–$3,000), boarding during travel, dental cleanings ($500–1,000), and behavior training.
## Moving Cost Estimator
URL: https://toolfyra.vercel.app/moving-cost-estimator.html
Category: Money & Business
Free moving cost estimator: home size and distance in — DIY truck+gas vs professional movers compared, with the hidden costs list most people forget.
A local move runs DIY $150–600 (truck $30–50/day + fuel + insurance + dollies) or pro movers $800–2,500+ (2–3 movers at $100–200/hr, 3–8 hours typical). This estimator sizes the job from your home's bedrooms, compares both paths, and lists the often-forgotten extras: packing materials ($100–300), mover tips (15–20%), utility setup fees and the pizza-you'll-owe-your-friends.
Q: How do movers price a job?
A: Hourly for local moves (crew size × rate × hours, 2-hour minimums), weight + distance for interstate.
Q: When is DIY clearly better?
A: Studio/small apartment, short distance, friends with a truck, and no heavy furniture — otherwise the injury-and-damage risk flips the math.
## Roommate Bill Split Calculator
URL: https://toolfyra.vercel.app/roommate-bill-split-calculator.html
Category: Money & Business
Free roommate split calculator: rent, utilities and shared bills split fairly — equal shares or by room size, with a printable breakdown for the group chat.
Flat-sharing math goes wrong on details: the master bedroom premium (typically 10–20% more), who has the en-suite, and bills in whose name. This calculator splits rent equally or by room weights, adds utilities and shared subscriptions, and outputs a per-person breakdown you can paste into the group chat — transparency prevents 90% of roommate fights.
Q: How much more should the master bedroom pay?
A: Common practice: 5–20% premium depending on size/en-suite — agree the percentage together BEFORE move-in.
Q: What about couples sharing a room?
A: Count a couple as 1.5 people — they share a room but consume shared resources like a second person.
## Subscription Audit Calculator
URL: https://toolfyra.vercel.app/subscription-audit-calculator.html
Category: Money & Business
Free subscription audit: add every Netflix, Spotify, gym and app subscription — see the shocking annual total and what investing it instead could grow to.
The average US household underestimates subscription spending by 2–3× (real average: ~$1,000+/year) — small monthly charges numb the brain. This calculator totals your list, shows the daily and yearly burn, ranks your subscriptions by cost, and shows what the same money invested at 7% becomes in 10 years — the only motivation that actually cancels things.
Q: How do I find subscriptions I forgot?
A: Check your bank/card statements for recurring charges, phone's App Store subscriptions page, and email search for 'receipt' or 'invoice'.
Q: What should I cancel first?
A: Anything unused for 30 days, then duplicates (three streaming services you never finish), then anything you'd not rebuy today at its annual price.
## Amazon Fee Calculator
URL: https://toolfyra.vercel.app/amazon-fee-calculator.html
Category: Money & Business
Free Amazon seller fee calculator: price and category in — referral fee (~8-15%), FBA fulfillment estimate, and your true profit margin after all Amazon cuts.
Amazon charges referral fees of 8–15% by category (15% is most common), plus FBA fulfillment fees (~$3–6 for standard items) and monthly storage. This calculator applies your category's referral rate, adds editable FBA costs, and shows net profit per unit and margin — the numbers that decide whether a product is worth selling at all.
Q: What is the minimum referral fee?
A: $0.30 per item minimum applies to most categories — matters for low-priced items.
Q: Are these 2025-26 fee levels?
A: Fee schedules update yearly (Feb usually) — use official Amazon Seller Central tables for binding numbers; this is an estimate.
## eBay Fee Calculator
URL: https://toolfyra.vercel.app/ebay-fee-calculator.html
Category: Money & Business
Free eBay fee calculator: sale price, category final value fee (~13.6% typical) and per-order fee — your true payout after eBay's cut, shipping and costs.
eBay's core fee is the final value fee: ~13.6% of the total amount of the sale (item + shipping + tax), with a $0.40 per-order fee for most categories (varies by category: books/CDs/DVDs higher, some categories lower). Add your item cost and shipping expense for true profit. Store subscribers get slightly different rates — this uses the standard non-store defaults, editable.
Q: Does the fee include shipping?
A: Yes — the final value fee applies to item price + shipping the buyer paid, which surprises new sellers.
Q: Do I pay fees if the item doesn't sell?
A: Auction-style listings may charge insertion fees (most sellers get 250 free/month); unsold fixed-price listings are generally free within the monthly allowance.
## Etsy Fee Calculator
URL: https://toolfyra.vercel.app/etsy-fee-calculator.html
Category: Money & Business
Free Etsy fee calculator: listing fee $0.20, 6.5% transaction fee, payment processing ~3% + $0.25, offsite-ads warning — your true per-sale profit.
Etsy's fee stack: $0.20 listing fee, 6.5% transaction fee on item + shipping, payment processing ~3% + $0.25 (US; varies by country), plus Offsite Ads (12–15%) when Etsy's ad brought the buyer — mandatory for shops over $10k/year. This calculator itemizes all of it and shows your margin, so pricing covers the stack plus profit.
Q: What are Offsite Ads?
A: Etsy advertises your products externally; if that ad converts, you pay 12% (over $10k/yr: 15%, reduced by volume) — mandatory once you cross the threshold.
Q: How should I price to survive fees?
A: A common framework: materials + labor + 25-30% margin, THEN add ~20-25% fee buffer — the calculator shows your real fee % to fine-tune.
## Reseller Margin Calculator
URL: https://toolfyra.vercel.app/reseller-margin-calculator.html
Category: Money & Business
Free reseller profit calculator: buy cost, sale price, marketplace fees and shipping — net profit, margin, ROI and the 3x rule verdict for flippers.
Flipping lives on one number: ROI = profit ÷ invested cash. The community standard is the 3× rule (sell for 3× your buy cost) because fees, shipping and dead stock eat the rest. This calculator runs any listing through sale price minus marketplace fees (eBay/Poshmark/Etsy presets) minus shipping minus cost — then tells you straight whether it clears the bar.
Q: What is the 3x rule?
A: Sell at 3× your acquisition cost: $10 item must fetch $30+ — it roughly guarantees worthwhile profit after ~13% fees + shipping + time.
Q: Which marketplace has the lowest fees?
A: Varies by category and volume — Facebook Marketplace/Craigslist are fee-free (local), eBay ~13.6%, Poshmark ~20%, Etsy 6.5%+ stack.
## Fuel Cost Calculator
URL: https://toolfyra.vercel.app/fuel-cost-calculator.html
Category: Travel & Documents
Free fuel cost calculator: trip distance, vehicle MPG and gas price — total fuel cost per person, plus return-trip and one-way toggles.
Road-trip budgeting starts with one formula: fuel cost = (distance ÷ MPG) × price. This calculator adds the details that matter — round trips, passengers splitting the cost, and unit switching for US (gallons, MPG) vs UK/Canada (liters, L/100km implied via MPG conversions). Cheap way to decide drive vs fly before prices surprise you.
Q: How accurate is MPG on highways?
A: Highway driving usually beats city MPG by 20–30%; use your real average from the car's trip computer for best results.
Q: Can I use liters per 100km?
A: Yes — switch the unit toggle; the math converts internally.
## EV vs Gas Calculator
URL: https://toolfyra.vercel.app/ev-vs-gas-calculator.html
Category: Travel & Documents
Free EV vs gas calculator: compare driving costs per mile and per year — home charging rates vs gas prices, with maintenance-savings context.
The per-mile math: a 30 MPG gas car at $3.45/gal costs ~11.5¢/mile; a 3.5 mi/kWh EV at $0.15/kWh home charging costs ~4.3¢/mile — 60%+ cheaper, and more if you have time-of-use night rates. Fast chargers (30–50¢/kWh) narrow the gap. This calculator runs your actual rates and shows annual savings at your mileage, plus the maintenance context (EVs skip oil changes but tires/insurance can run higher).
Q: Is EV charging always cheaper?
A: Home charging almost always; DC fast-charging road trips can cost near gas prices. Public-network pricing varies wildly.
Q: What about battery replacement cost?
A: Modern EV batteries typically outlast 8yr/100k+ warranties; budget-mentally amortize a $5–15k replacement over 10+ years for worst-case honesty.
## Jet Lag Advisor
URL: https://toolfyra.vercel.app/jet-lag-advisor.html
Category: Travel & Documents
Free jet lag advisor: time zones crossed in, recovery days and adaptation tips out — east-vs-west rules of thumb, light exposure and sleep-shift schedule.
The old rule of thumb holds surprisingly well: about 1 recovery day per time zone crossed — and flying east is harder than west (~1.5×), because advancing your clock fights biology more than delaying it. The proven helpers: shift sleep 1 hour/day toward the destination before departure, get morning light after eastward flights (evening light after westward), stay awake to local bedtime on day one, hydrate, and go easy on alcohol in-flight. This advisor estimates your recovery window and gives the schedule.
Q: How long does jet lag last?
A: Typically 1 day per time zone (up to ~1.5 days eastward) — crossing 6 zones ≈ 4–7 rough days without countermeasures.
Q: Do melatonin pills help?
A: Low-dose melatonin (0.5–5mg) at local bedtime has decent evidence for resetting rhythm — ask a pharmacist/doctor, especially with other medication.
## Travel Budget Calculator
URL: https://toolfyra.vercel.app/travel-budget-calculator.html
Category: Travel & Documents
Free travel budget calculator: days, daily spend style, flights and activities — total trip cost with the 15% emergency buffer professionals add.
Trip budgets fail on the invisible third: local transport, tips, coffee stops and surprises — hence the 15% buffer built into this planner. Set your daily style (budget hostel ~$60/day, mid-range ~$150, comfort ~$300+ in most Tier-1 cities), add fixed costs (flights, hotels pre-paid, activities), and get the honest total plus a per-day view for on-trip tracking.
Q: How much should the buffer be?
A: 10–20% is standard for Tier-1 travel — higher for adventure trips where plans change.
Q: Does this include visas/insurance?
A: No — add those as fixed items; travel insurance for a 2-week Tier-1 trip typically runs $50–150.
## Vacation Accrual Calculator
URL: https://toolfyra.vercel.app/vacation-accrual-calculator.html
Category: Money & Business
Free PTO accrual calculator: annual allowance, hours worked and usage — see accrued vacation hours, remaining balance and your next full day earned.
Unlike most Tier-1 countries' statutory leave, US vacation is a benefit employers define — commonly accrued per hour worked: 2 weeks/year ≈ 0.0385 hours per hour (3 weeks ≈ 0.0577). This calculator tracks your accrual from hours worked, subtracts days taken, and projects your year-end balance — including whether unused time rolls over or hits a cap.
Q: Does my employer have to pay out unused PTO?
A: Depends on the state — California and many others require payout at separation; in others 'use it or lose it' is legal if policy says so.
Q: How do I convert hours to days?
A: Divide accrued hours by your standard workday (8 usually) — the tool does it for you.
## Invoice Late Fee Calculator
URL: https://toolfyra.vercel.app/invoice-late-fee-calculator.html
Category: Money & Business
Free late invoice calculator: invoice amount, due date and daily rate — interest owed, running total by month, and a polite-but-firm chase email template.
Late fees are usually set in your terms: 1–1.5% per month (≈12–18% APR) is standard and enforceable when agreed upfront. This calculator computes the interest for any overdue invoice, shows the monthly breakdown, and includes the 3-step chase sequence (polite nudge → firm reminder → final-with-fee) — because the fee works best as leverage you actually apply.
Q: Can I charge interest if my invoice didn't mention it?
A: Only if agreed in the contract/terms — put a late-fee clause in every future invoice; without it you're limited to collections pressure.
Q: What is statutory interest for businesses?
A: In the UK, business-to-business debt carries statutory interest (8% + Bank of England base) even without a clause; US varies by state and contract.
## Freelance Rate Calculator
URL: https://toolfyra.vercel.app/freelance-rate-calculator.html
Category: Money & Business
Free freelance rate calculator: target salary + expenses + billable hours + taxes = your true hourly rate — the math most freelancers get wrong by 40%.
Employees get paid for every hour including vacation; freelancers bill maybe 25–30 hours/week of genuinely billable time, pay self-employment tax on top of income tax, and fund their own insurance, retirement and software. This calculator converts your target salary into a rate that survives reality: billable weeks, effective tax %, and monthly business overhead — the number that keeps you afloat, not just busy.
Q: Why is my calculated rate so high?
A: Because employment hides a third of your compensation — matching your old salary legitimately requires the higher rate.
Q: Should I charge hourly or per project?
A: Start hourly with this floor, then move to per-project pricing using the hourly as your internal math — value-based pricing comes last.
## Grade Calculator
URL: https://toolfyra.vercel.app/grade-calculator.html
Category: Calculators
Free grade calculator: enter category weights and scores (homework 20%, midterm 30%…) — current weighted grade, letter equivalent, and what's still possible.
US courses grade by weighted categories, not averages — acing homework (20%) can't rescue a failing final (40%). This calculator takes each category's weight and your score, computes the exact weighted percentage so far, converts it to the standard letter scale (A 90+, B 80+…), and shows how much remains recoverable if the final is still ahead.
Q: How do weighted grades work?
A: Each category contributes its weight × your average in it — 90% homework at 20% weight adds 18 points to your total.
Q: My teacher drops the lowest score — help?
A: Average the remaining scores in that category first, then enter the result as the category score.
## Final Exam Grade Calculator
URL: https://toolfyra.vercel.app/final-exam-grade-calculator.html
Category: Calculators
Free final grade calculator: current grade, exam weight and target — the exact score you need on the final, with honest feasibility verdicts.
The formula every student needs once a semester: required = (target − current × (1 − weight)) ÷ weight. Enter your current standing, the final's weight, and your target grade — get the exact score needed. When the required score tops 100%, the tool says so honestly and shows the best achievable grade instead of false hope.
Q: My class uses points not percentages?
A: Convert: current grade = points earned ÷ points possible so far; exam weight = final's points ÷ total course points.
Q: Can I aim for a target below my current grade?
A: Yes — the formula gives a lower (or even negative) requirement: a cushion, protect it and sleep.
## Business Days Calculator
URL: https://toolfyra.vercel.app/business-days-calculator.html
Category: Calculators
Free business days calculator: count working days between two dates (weekends excluded) or add N business days to a date — deadline math for contracts and SLAs.
Business-day math trips everyone: '10 business days' ≈ 14 calendar days most weeks. This calculator counts working days (Mon–Fri) between dates in either direction, and adds business days forward for deadline setting — the same math SLAs, contracts and shipping estimates run on. Public holidays vary by country/region, so add those manually where they fall.
Q: Are public holidays excluded?
A: Not automatically — holidays differ by country/state. Count here, then subtract holidays that fall on weekdays in your range.
Q: Does the count include the start date?
A: By default no — '5 business days from Monday' lands the following Monday. Toggle inclusion if your contract says otherwise.
## ATS Resume Scanner
URL: https://toolfyra.vercel.app/ats-resume-scanner.html
Category: Text Tools
Free ATS resume scanner: paste a job description and your resume — see keyword match rate, missing must-have terms, and fix list before you apply. 100% private.
Applicant Tracking Systems rank resumes by keyword coverage against the job description — exact-phrase skills, tools and requirements. This scanner runs that comparison locally in your browser: match rate, matched terms, and the critical missing list to weave into your resume honestly (only where you genuinely have the experience — swap synonyms, rephrase, never fabricate). Nothing is uploaded.
Q: Does ATS really reject on keywords?
A: Systems score and rank resumes; recruiters rarely open past the first screen — keyword alignment is what buys that opening.
Q: How do I fix missing terms honestly?
A: If you have the skill under a different name ('CI/CD pipelines' vs 'Jenkins'), rephrase. If you don't have it — don't add it; interviews expose padding.
Q: Are my documents uploaded?
A: No — comparison happens entirely in your browser.
## LinkedIn Headline Generator
URL: https://toolfyra.vercel.app/linkedin-headline-generator.html
Category: Generators
Free LinkedIn headline generator: role + value + proof formulas — 6 headline variants beyond 'Manager at X', with the character limit checked.
Your headline follows you into every feed, comment and search result — it is the most-read 220 characters you write. The pattern that works: (What you do) for (who) | (proof/specialism) | (hook). This generator builds variants from your role, audience and proof point — outcomes-led, keyword-rich (headlines are search-indexed by recruiters), and honest.
Q: Do keywords in headlines matter for recruiter search?
A: Yes — LinkedIn search weighs headline text heavily; include the terms recruiters in your field actually search (job titles, skills).
Q: Should I use emojis in the headline?
A: One or two max, professional contexts — they aid scanning; a wall of emojis reads as spam.
## Cold Email Generator
URL: https://toolfyra.vercel.app/cold-email-generator.html
Category: SEO & Marketing
Free cold email generator: goal and context in — short, personal outreach emails out (sales, freelance pitch, job inquiry, collaboration) with follow-up sequences.
Cold emails fail when they're about the sender. The pattern that earns replies: one line of genuine relevance → one line of specific value → one tiny ask, under 100 words, no attachments, no 'hope this finds you well'. This generator builds that structure for sales outreach, freelance pitches, job inquiries and collaborations — plus a 2-email follow-up sequence (most replies come from follow-ups, not the first send).
Q: How many follow-ups should I send?
A: 2–3, spaced 3–4 business days — most replies arrive after the first follow-up, and beyond 3 it's spam territory.
Q: Is cold email legal?
A: B2B cold email is legal in most jurisdictions (CAN-SPAM/GDPR with conditions: identify yourself, no misleading subject, honor opt-outs). B2C stricter — check local rules.
## Crypto Profit Calculator
URL: https://toolfyra.vercel.app/crypto-profit-calculator.html
Category: Money & Business
Free crypto profit calculator: buy price, sell price, amount and exchange fees (~0.1-0.5%) — net P&L, ROI % and the break-even sell price you need.
Crypto P&L is (sell − buy) × amount, minus fees on BOTH sides — spot fees run 0.1–0.5% per trade at major exchanges, plus spread and (often forgotten) withdrawal/network fees. This calculator nets it all out and shows the break-even sell price — the price where you'd exit at exactly zero, which active traders should know before every trade.
Q: Do fees really matter that much?
A: Round-trip fees of 0.5–1% on an active strategy compound brutally — 100 trades at 0.6% round-trip ≈ 45% of capital gone to fees.
Q: What about taxes on crypto gains?
A: Most Tier-1 countries tax crypto as property/capital gains — every disposal can be a taxable event; keep records (tools like Koinly automate it).
## Dividend Yield Calculator
URL: https://toolfyra.vercel.app/dividend-yield-calculator.html
Category: Money & Business
Free dividend yield calculator: share price and dividend in — yield %, annual income on your shares, and the yield-trap warning context.
Dividend yield = annual dividends per share ÷ share price ($2 dividend on a $50 stock = 4%). For income investors, the yield on YOUR cost basis matters more than the current-market yield. And the classic trap: a suddenly huge yield often means the price crashed because the market doubts the dividend's survival — this calculator shows your income and keeps the trap-warning honest.
Q: What is a normal dividend yield?
A: S&P 500 average ≈ 1.3–1.6%; 3–5% is solid income territory; 8%+ usually signals trouble or a special dividend.
Q: Is dividend investing better than growth?
A: Neither is universally better — dividends suit income needs; total return (growth + dividends) is what long-term wealth tracks.
## Net Worth Calculator
URL: https://toolfyra.vercel.app/net-worth-calculator.html
Category: Money & Business
Free net worth calculator: assets (cash, home, investments) minus debts — your true net worth, tracked against age-based benchmarks.
Net worth = everything you own minus everything you owe — the single best snapshot of financial position. This calculator totals cash, investments and property against mortgages, loans and cards, then contextualizes with popular benchmarks (e.g. Fidelity's guideline: 1× salary by 30, 2× by 35, 6× by 50). Re-run it quarterly; the trend is the point.
Q: Should my car count as an asset?
A: Include it at resale value if you want precision — but many planners exclude depreciating toys; be consistent across runs.
Q: Is student debt included?
A: Yes — every liability: mortgage, student loans, car loans, cards, even the family loan.
## Background Remover
URL: https://toolfyra.vercel.app/background-remover.html
Category: Image Tools
Free background remover for photos with solid or simple backgrounds. Pick the background color, tune tolerance, and download a transparent PNG. 100% in your browser — no upload.
This tool removes a photo's background without uploading anything. Click any part of the background: the tool flood-fills from that point, erasing connected pixels whose color stays within your chosen tolerance. Add or restore detail with the restore brush if an edge bites too much. Honest note: automatic AI cutouts of hair, fur and busy scenes need heavy machine-learning models — those run on servers at other sites (which is exactly the upload-privacy problem). For solid and simple backgrounds — products, documents, logos, ID photos — this local approach is fast, free and private.
Q: How do I remove a background without uploading my photo?
A: You are looking at it: this tool processes the image entirely in your browser with canvas pixels. There is no upload step at all — you can watch the network tab stay silent.
Q: Which photos work best?
A: Solid or smooth backgrounds (white, studio, sky) with a clear edge to the subject: product photos, logos, documents, ID-style pictures. Busy outdoor scenes and flyaway hair need AI models that run on servers.
Q: What does tolerance do?
A: Tolerance is how different a pixel's color may be from your clicked color and still count as background. Low tolerance erases only near-identical pixels; high tolerance eats gradients and shadows too.
Q: Is the output really transparent?
A: Yes — you download a PNG with an alpha channel. JPG does not support transparency, which is why the download is PNG even for JPG inputs.
Q: Why is the result better than an AI remover for my product shot?
A: On a clean studio background, a color-based cutout follows the true edge pixel-by-pixel — no AI hallucinated margins, no subscription watermark.
Q: Does it work on phone?
A: Yes. Tap instead of click, pinch-zoom the canvas, and the download saves straight to your photos or downloads folder.
## Fancy Text Generator
URL: https://toolfyra.vercel.app/fancy-text-generator.html
Category: Text Tools
Turn normal text into 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝔤𝔬𝔱𝔥𝔦𝔠, ⓑⓤⓑⓑⓛⓔ and 15+ more Unicode styles. Copy-paste anywhere — Instagram bios, WhatsApp status, Twitter. Free, instant, private.
Fancy text works by swapping each letter for a Unicode twin: the same alphabet rendered in mathematical bold, script, fraktur, circled, full-width and more. Because these are standard Unicode characters (not a font file), they carry over into bios, captions, comments and chat apps on every device. Honest note: screen readers may read styled letters letter-by-letter, and some apps strip rare blocks — so keep fancy text for short names, bios and headlines, and write long posts in normal text.
Q: Is fancy text actually a font?
A: No — it is a set of Unicode characters. Your phone already ships glyphs for them, which is why no font installation is needed and it pastes anywhere as plain text.
Q: Why do some characters show as boxes (□)?
A: A few Unicode blocks (mathematical bold small caps, some fraktur lowercase) are missing from certain device fonts. Pick another style — the classic bold, italic, script and bubble styles work virtually everywhere.
Q: Will Instagram and WhatsApp accept it?
A: Yes — bios, captions, comments, statuses and chat messages keep Unicode styling. Some games and forms block non-ASCII input; test before committing a username.
Q: Is it bad for SEO or accessibility?
A: Search engines read styled characters as different letters, so never use fancy text in headings or important keywords. For accessibility, avoid long passages — screen readers may spell styled letters individually.
Q: Does it cost anything?
A: Nothing — the tool runs in your browser, no account, no limits, and your text never leaves your device.
Q: Can I mix two styles in one line?
A: Yes — copy the parts separately: generate the first word in one style, the second in another, then paste them together.
## Number to Words Converter
URL: https://toolfyra.vercel.app/number-to-words.html
Category: Calculators
Convert any number to English words instantly: 1,250,000 → one million two hundred fifty thousand. International (million/billion) and Pakistani/Indian (lakh/crore) systems, with cheque currency mode.
Banks reject cheques when figures and words disagree, so this converter writes amounts the way tellers expect. Choose International (1,000,000 = one million) or South-Asian numbering (10,00,000 = ten lakh), switch on cheque mode to prefix “Rupees” and suffix “Only” with paisa handled correctly, and copy with one tap. Everything is computed locally — no number ever leaves your device, which matters for salary and invoice amounts.
Q: How do you write 1250000 in words?
A: International: one million two hundred fifty thousand. South-Asian system: twelve lakh fifty thousand. The tool shows both so you can match your bank's format.
Q: What is cheque mode?
A: Cheque mode formats the output as “Rupees (amount) Only” — the layout Pakistani and Indian banks expect on the words line — and converts any decimal part to “and XX Paisa”.
Q: How big a number is supported?
A: Up to 999 trillion in international mode (or 99 kharab / lakh-crore stacking in South-Asian mode) — far beyond any cheque or invoice.
Q: Does it handle decimals?
A: Yes. The decimal part is read digit-by-digit in normal mode (“point five two”) and as paisa in cheque mode.
Q: Why do lakh and crore exist?
A: South-Asian numbering groups digits in 2-2-3 (thousand, lakh, crore) instead of Western 3-3-3 (thousand, million, billion). Legal documents in Pakistan and India commonly use lakh/crore.
Q: Is my number sent anywhere?
A: No — conversion is plain JavaScript in your browser. Nothing is uploaded, stored or logged.
## Wheel Picker
URL: https://toolfyra.vercel.app/wheel-picker.html
Category: Generators
Free spin-the-wheel random picker: add names, spin, get a fair winner. Perfect for classroom picks, giveaways and decisions. No signup, works offline in your browser.
A wheel of names everyone can see beats picking from a hat: the spin is visible, the result feels fair, and no name gets lost. Paste your list, spin with a click (or spacebar), and the wheel decelerates with real physics before the pointer declares a winner. Choose whether to remove winners after each spin for knock-out rounds. Private by design: your list lives only in this browser tab — student names and giveaway entries are never sent anywhere.
Q: Is the spin really random?
A: Yes — the winning segment is decided by where physics stops the wheel (angle + speed), not by favoring any name. Every entry occupies an equal slice unless you add duplicates to weight it.
Q: How do I give some entries a better chance?
A: Add the name multiple times — three copies means triple the slice and triple the odds.
Q: Can I remove the winner and spin again?
A: Yes — turn on 'Remove winner after spin' for knockout rounds (e.g., prize draws with multiple prizes).
Q: Does it work offline?
A: Once the page has loaded, spinning needs no internet at all — handy for classrooms with weak Wi-Fi.
Q: How many names fit on the wheel?
A: Up to 60 slices stay readable. Beyond that the wheel still works but labels shrink — use it for big giveaways with a shorter finalist list.
Q: Is my list private?
A: Completely. Names live in your browser only — no upload, no account, nothing stored.
## Zakat Calculator
URL: https://toolfyra.vercel.app/zakat-calculator.html
Category: Money & Business
Free Zakat calculator with 2026 nisab: enter gold, silver, cash, investments and liabilities — get your exact 2.5% Zakat. Hanafi method, editable gold/silver rates, private.
Zakat is 2.5% of your qualifying wealth held for one lunar year, payable only if your total meets or exceeds the nisab. The nisab is traditionally set at 87.48 grams of gold or 612.36 grams of silver — scholars commonly recommend the silver nisab because it brings more relief to the poor. This calculator follows the standard Hanafi worksheet: add gold and silver at current value, cash in hand and in banks, invested wealth and business inventory, then subtract immediate liabilities and due debts. Important: rates below are placeholders pre-filled for convenience — update them with today's market rate before relying on the result, and ask a scholar about unusual cases (loans, agriculture ushr, business stock valuation).
Q: What is the nisab in 2026?
A: Nisab is defined in grams, not currency: 87.48g of gold or 612.36g of silver. Its cash value moves daily with market prices — that is why this tool lets you edit the per-gram rates instead of hardcoding a rupee figure.
Q: Which nisab should I use — gold or silver?
A: Both are valid; the silver nisab gives a much lower threshold, so more wealth qualifies and more Zakat is paid — most South-Asian scholars recommend it. The tool shows your status against both.
Q: Is Zakat due on my salary?
A: Zakat applies to wealth you hold, not income as it arrives. Zakat becomes due on savings you have held for one lunar year (hawl), or on the anniversary date if your savings fluctuate.
Q: Do I pay Zakat on my house or car?
A: Not on your personal residence, personal car or daily-use items. Zakat applies to wealth and tradable assets — investments, spare cash, business inventory, gold and silver.
Q: What rate is Zakat?
A: 2.5% (one-fortieth) of net qualifying wealth. The calculator shows the exact figure to the nearest rupee.
Q: Is my financial data stored?
A: No — every field is computed in your browser and forgotten when you close the tab. Nothing is transmitted or saved.
## Text to Speech
URL: https://toolfyra.vercel.app/text-to-speech.html
Category: Text Tools
Free text-to-speech that reads any text aloud using your device's built-in voices. Adjust speed and pitch, choose a voice, no upload, no character limit — private by design.
This reader uses the Web Speech API built into your browser: the same offline voices your phone's accessibility features use. Pick a voice, tune speed and pitch, and press play — even long articles stream sentence-by-sentence. Honest note: voice quality depends on your device (Chrome and Edge on Windows/Android usually ship the best neural voices), there is no studio-grade narration, and it cannot save an audio file — it is a reader, not an exporter.
Q: Is my text uploaded to a server?
A: No. Speech synthesis runs on your device through the browser's built-in engine — you can disconnect from the internet after the page loads and it keeps reading.
Q: Can I download the audio as MP3?
A: Not with this tool — the Web Speech API plays audio without exporting it. Recording your device output is a separate matter; check local rules before recording.
Q: Why do some voices sound robotic?
A: Voices come from your operating system. Installing your platform's enhanced/neural voice packs (free on Windows, Android and iOS) upgrades the quality instantly.
Q: Is there a length limit?
A: No practical limit — long text is queued sentence-by-sentence. Extremely long pastes may pause briefly between chunks on older phones.
Q: Which browsers work best?
A: Chrome and Edge have the widest voice support. Safari works on Apple devices. Some Android browsers ship no voices at all — the tool will tell you.
Q: Does it cost anything?
A: No — it uses your device's own speech engine. No account, no usage caps, no watermark.
## Sign PDF
URL: https://toolfyra.vercel.app/sign-pdf.html
Category: PDF Tools
Draw your signature and place it on any PDF page — all in your browser with zero uploads. Choose page, position and size, then download the signed PDF. Free, private, watermark-free.
Most “free PDF signing” sites upload your contract to their server, process it, and send it back — hoping you trust their storage. This tool does the whole job inside your browser using PDF-manipulation code loaded once: your signature is drawn on a canvas, embedded as a transparent image at the position you click, and the finished PDF is saved straight back to your device. Honest note: this adds a visible handwritten signature image — it is not a cryptographic digital certificate (eIDAS/ESIGN qualified signature), which requires identity-verified certificate authorities.
Q: Is my contract uploaded anywhere?
A: No — that is the point of this tool. The PDF is opened by your browser, modified in memory and saved by your browser. No server receives it.
Q: Is this a legal signature?
A: A visible signature image is accepted on most everyday documents (consent forms, invoices, internal approvals). For qualified digital signatures required by some governments, you need a certificate-based signer — this tool does not pretend to be one.
Q: Can I sign on multiple pages?
A: Yes — select the page number and click again; every click stamps the signature at that spot. Use the reset button to clear all stamps before downloading.
Q: Can I resize or recolor the signature?
A: Yes — scale it with the size slider and pick black, blue or red ink before stamping.
Q: Does it work with scanned PDFs?
A: Yes — a scanned page is just an image in a PDF; the signature stamps on top of it the same way.
Q: Why is the file bigger after signing?
A: The signature image is embedded inside your PDF. The increase is small (a few KB per stamp) and the document stays a normal PDF.
## Electricity Bill Calculator
URL: https://toolfyra.vercel.app/electricity-bill-calculator.html
Category: Money & Business
Estimate your Pakistani electricity bill from units consumed: editable slab tariffs, taxes and surcharges included. Works for any DISCO — just adjust rates from your latest bill.
Pakistani power tariffs are slab-based: units are billed in tiers (e.g., first 100 units cheapest, above 700 most expensive) and taxes stack on top. Because rates change by notification and differ between LESCO, KE, GEPCO and other DISCOs, this tool ships with an example tariff and lets you edit every slab and tax from your latest bill — making the estimate match your area exactly. Honest note: the output is an estimate for budgeting; fuel-price adjustments applied retroactively by your DISCO can differ.
Q: Why do my numbers differ slightly from the actual bill?
A: DISCOs apply fuel-price adjustments (FPA) and quarterly tariffs retroactively, and meter rent or TV-fee lines vary. Edit the tax fields from your latest bill to align the estimate.
Q: What are slab tariffs?
A: Units are billed in tiers: e.g., first 100 units at one rate, 101–200 at a higher rate, and so on — you pay each tier's rate only for the units inside it. The tool computes each slab separately.
Q: Which companies does this cover?
A: Any Pakistani DISCO (LESCO, KE, GEPCO, FESCO, HESCO…) because every rate field is editable — match the numbers printed on your bill.
Q: Is protected-consumer logic included?
A: If your bill shows a 'protected consumer' flat tariff, replace the slabs with that single rate — the calculator handles any single- or multi-slab setup.
Q: Can I estimate before the bill arrives?
A: Yes — read your meter, enter the units consumed so far, and you get an expected total using the current slabs.
Q: Is any data uploaded?
A: No. Your consumption and rates never leave this page.