Free Online Tools That Just Work
151 fast, private tools — calculators, PDF, images, money, health, SEO, developer tools and more. Everything runs in your browser: no signup, no uploads, no watermarks.
🎯 Find tools by your role
Pick your job — here are the exact tools people like you use most (all free, all in-browser).
| Role | Best tools |
|---|---|
| Digital marketer | Meta tags • UTM builder • Hashtags • Readability • Keyword density • Engagement rate |
| Student / researcher | Citations • Word counter • GPA ⇄ % • Date difference • Case converter |
| Freelancer / small business | Invoices • GST/VAT • Margins • EMI • Time zones |
| Developer | JSON • Regex • Base64 • JWT • Cron • UUID |
| Content creator | Thumbnails • Fancy fonts • Insta line-breaks • QR codes • YT earnings |
| Traveler / immigrant | Visa photo check • Flight compensation • Time zones |
| Health & family | TDEE calories • BMI • Due date • Ovulation |
🛡️ The no-upload standard (compare us)
| Tool | Runs offline? | No account | Files never uploaded |
|---|---|---|---|
| Merge PDF | ✅ (after load) | ✅ | ✅ pdf-lib in your browser |
| Image compressor | ✅ (after load) | ✅ | ✅ Canvas API, local |
| Visa photo checker | ✅ (after load) | ✅ | ✅ pixels never leave device |
| QR generator | ✅ (after load) | ✅ | ✅ no server round-trip |
| JSON formatter | ✅ (after load) | ✅ | ✅ text stays local |
How we test this claim: load the page, go offline, and keep working — everything here is processed by your own device.
📘 Latest from the blog
Step-by-step guides written from live search data — updated 2026-08-28.
How to Use 401k Growth Calculator — Step-by-Step Gui
How-to guide with steps, pitfalls and FAQs — free, in-browser.
📖How to Use Age Calculator — Step-by-Step Guide (2026
How-to guide with steps, pitfalls and FAQs — free, in-browser.
📖How to Use AI Bio Generator — Step-by-Step Guide (20
How-to guide with steps, pitfalls and FAQs — free, in-browser.
📖How to Use AI Caption Generator — Step-by-Step Guide
How-to guide with steps, pitfalls and FAQs — free, in-browser.
📖How to Use AI Content Idea Generator — Step-by-Step
How-to guide with steps, pitfalls and FAQs — free, in-browser.
📖How to Use Multi-Prompt Generator — Step-by-Step Gui
How-to guide with steps, pitfalls and FAQs — free, in-browser.
Calculators
Everyday calculators: age, percentage, loan EMI, BMI — instant and private.
Age Calculator
Free age calculator: find your exact age in years, months and days from your date of birth…
％Percentage Calculator
Free percentage calculator: what is X% of Y, X is what percent of Y, and percentage increa…
🏦EMI / Loan Calculator
Free EMI calculator: compute monthly loan payments, total interest and total repayment for…
⚖️BMI Calculator
Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy we…
🎓CGPA / Percentage Converter
Free CGPA to percentage calculator: convert CGPA↔percentage using the CBSE (×9.5) and HEC-…
📏Land Area Converter
Free land area converter: convert between Marla, Kanal, Acre, Hectare, Square Feet, Square…
📆Date Difference Calculator
Free date difference calculator: days, weeks, months and working days between two dates. G…
🧁Cooking Unit Converter
Free cooking converter: cups, tablespoons, teaspoons, fluid ounces, milliliters and grams …
🏷️Unit Price Comparator
Free unit price comparator: compare two pack sizes and prices — which is actually cheaper …
🐕Pet Cost Calculator
Free pet cost calculator: food, vet, insurance, grooming and boarding for dogs and cats — …
🎓Grade Calculator
Free grade calculator: enter category weights and scores (homework 20%, midterm 30%…) — cu…
📝Final Exam Grade Calculator
Free final grade calculator: current grade, exam weight and target — the exact score you n…
📅Business Days Calculator
Free business days calculator: count working days between two dates (weekends excluded) or…
🔢Number to Words Converter
Convert any number to English words instantly: 1,250,000 → one million two hundred fifty t…
Text Tools
Word counter, case converter and text cleanup utilities for writers and students.
Word Counter
Free word counter: live count of words, characters (with and without spaces), sentences, p…
AaCase Converter
Free case converter: switch text between UPPERCASE, lowercase, Title Case, Sentence case, …
🧰Text Toolkit
Free text toolkit: remove duplicate lines, sort, trim, remove empty lines, number lines, e…
📚Citation Generator
Free citation generator: create APA 7 and MLA style citations for websites, books and jour…
📝Lorem Ipsum Generator
Free lorem ipsum generator: create placeholder paragraphs, sentences or words for mockups …
🔀Text Diff Checker
Free text diff checker: compare two texts or code snippets line by line. Added, removed an…
🪪Fake Name Generator
Free fake name generator: create random realistic test names by country and gender for app…
🏠Fake Address Generator
Free fake address generator: realistic-format fictional addresses for testing forms, QA, d…
📄ATS Resume Scanner
Free ATS resume scanner: paste a job description and your resume — see keyword match rate,…
✨Fancy Text Generator
Turn normal text into 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝔤𝔬𝔱𝔥𝔦𝔠, ⓑⓤⓑⓑⓛⓔ and 15+ more Unicode styles. Copy-paste…
🔊Text to Speech
Free text-to-speech that reads any text aloud using your device's built-in voices. Adjust …
Generators
QR codes, strong passwords and WhatsApp click-to-chat links in one click.
Password Generator
Free strong password generator: create random passwords up to 64 characters with letters, …
📱QR Code Generator
Free QR code generator: turn links, text, WiFi or contact info into a downloadable QR code…
💬WhatsApp Link Generator
Free WhatsApp link generator: create wa.me click-to-chat links with a pre-filled message —…
🤖AI Prompt Generator
Free AI prompt generator: build detailed, structured prompts for Midjourney, Stable Diffus…
✉️Gmail Alias Generator
Free Gmail alias generator: create unlimited WORKING aliases of your Gmail with the plus-t…
🎮Username Generator
Free username generator: aesthetic, gaming, professional and cute username ideas for Insta…
🎥Video to Prompt Generator
Free video-to-prompt generator: describe or paste a video reference and get 6 production-r…
🎞️Multi-Prompt Generator
Free multi-prompt generator: one topic in, a consistent 8-scene prompt set out — same styl…
💼LinkedIn Headline Generator
Free LinkedIn headline generator: role + value + proof formulas — 6 headline variants beyo…
🎡Wheel Picker
Free spin-the-wheel random picker: add names, spin, get a fair winner. Perfect for classro…
Image Tools
Compress, resize and convert images right in your browser — nothing is uploaded.
Image Compressor
Free image compressor: shrink JPG, PNG or WebP files in your browser. Slide for quality or…
📐Image Resizer
Free image resizer: resize photos to exact pixel dimensions with aspect-ratio lock. Choose…
🔄Image Converter (WebP → JPG)
Free image converter: convert WebP to JPG or PNG (and vice versa) in your browser. Fixes '…
🎨Color Picker from Image
Free color picker from image: upload a photo and pick any pixel's color, plus extract the …
🧹EXIF / Metadata Remover
Free EXIF metadata remover: strip GPS location, camera info and timestamps from photos by …
💧Image Watermark Tool
Free image watermark tool: add text watermarks (logo-style) to photos with position, opaci…
🧵Screenshot Stitcher
Free screenshot stitcher: combine multiple screenshots into one long vertical image — perf…
⭐Favicon Generator
Free favicon generator: turn any logo or image into 16, 32, 48, 180, 192 and 512px favicon…
🪄Background Remover
Free background remover for photos with solid or simple backgrounds. Pick the background c…
PDF Tools
Merge PDFs, convert JPG to PDF and extract pages — free, fast and 100% private.
Merge PDF
Free PDF merger: combine multiple PDF files into one document, in your chosen order. 100% …
🖼️JPG to PDF
Convert JPG and PNG images to a single PDF free — in your browser. Photos never upload, pe…
✂️PDF Page Extractor
Free PDF page extractor: pull selected pages (e.g. 1,3,5-8) into a new PDF. Browser-based,…
✍️Sign PDF
Draw your signature and place it on any PDF page — all in your browser with zero uploads. …
Travel & Documents
Flight compensation checker and visa photo compliance tools for Tier-1 travelers.
Flight Compensation Checker (EU261)
Free EU261 flight compensation checker: delayed 3+ hours, cancelled or denied boarding? Ch…
🛂Visa & DV Lottery Photo Checker
Free visa photo checker: validate your photo against US DV Lottery (600×600px, ≤240KB), US…
🕐Time Zone Converter
Free time zone converter: convert any time between UTC, New York, London, Berlin, Dubai, K…
⛽Fuel Cost Calculator
Free fuel cost calculator: trip distance, vehicle MPG and gas price — total fuel cost per …
🔌EV vs Gas Calculator
Free EV vs gas calculator: compare driving costs per mile and per year — home charging rat…
🌍Jet Lag Advisor
Free jet lag advisor: time zones crossed in, recovery days and adaptation tips out — east-…
🧳Travel Budget Calculator
Free travel budget calculator: days, daily spend style, flights and activities — total tri…
Money & Business
Invoices, GST/VAT, profit margins, compound interest and salary-side calculators for freelancers and small business.
Tip Calculator
Free tip calculator: add a tip percentage, split the bill between friends and see exactly …
🧾GST / VAT Calculator
Free GST/VAT calculator: add tax to a net price or remove (reverse) tax from a gross price…
📈Profit Margin Calculator
Free profit margin calculator: compute margin %, markup % and profit from cost and selling…
🌱Compound Interest Calculator
Free compound interest calculator: project savings growth with yearly/quarterly/monthly co…
🧾Invoice Generator
Free invoice generator: create a professional invoice with items, tax and totals — then pr…
💸Debt Payoff Coach
Free debt payoff coach: track debts, see your debt-free date, compare snowball vs avalanch…
⏱️Hourly to Salary Converter
Free hourly to salary converter: hourly rate × hours × weeks = annual, monthly and weekly …
💵Paycheck Estimator
Free US paycheck estimator: salary minus estimated federal, state, FICA and pre-tax deduct…
⏰Overtime Pay Calculator
Free overtime pay calculator: regular + 1.5x + double-time breakdown for daily and weekly …
🎁Bonus Tax Calculator
Free bonus tax calculator: see how a bonus is taxed two ways — the 22% federal supplementa…
🛒Sales Tax Calculator
Free sales tax calculator: add tax to a pre-tax price or remove tax from a total (reverse …
📈Capital Gains Estimator
Free capital gains estimator: buy/sell price, holding period, and estimated US tax — 0%/15…
🏦401k Growth Calculator
Free 401k growth calculator: contribution + employer match projected to retirement with co…
⚔️Roth vs Traditional Calculator
Free Roth vs Traditional calculator: same contributions, different tax timing — see which …
👴Social Security Claiming Calculator
Free Social Security calculator: see your estimated monthly benefit at every claiming age …
🏠Mortgage Affordability Calculator
Free mortgage affordability calculator: income and debts in, maximum home price out — the …
📑Closing Cost Estimator
Free closing cost estimator: loan price in, estimated buyer closing costs out — originatio…
🔄Refinance Break-Even Calculator
Free refinance break-even calculator: old vs new payment and closing costs — see exactly h…
🔑Rent Affordability Calculator
Free rent affordability calculator: income in, max rent out — the 3x gross rule landlords …
🏘️Rent vs Buy Calculator
Free rent vs buy calculator: monthly rent vs owning costs (mortgage, tax, insurance, maint…
🚗Auto Loan Calculator
Free auto loan calculator: car price, trade-in, sales tax, down payment, rate and term — m…
🤝Lease vs Buy Calculator
Free lease vs buy calculator: compare 3-year total cost of leasing vs buying the same car …
📉Car Depreciation Calculator
Free car depreciation calculator: see your car's estimated value year by year — the 20%-ye…
🇬🇧UK Take-Home Calculator
Free UK salary calculator: gross to take-home with 2026/27 income tax bands (£12,570 allow…
🏷️UK Stamp Duty Calculator
Free UK Stamp Duty Land Tax calculator: price in, SDLT out — current England/NI bands, fir…
🚙UK Mileage Allowance Calculator
Free UK mileage calculator: AMAP rates (45p first 10,000 miles, 25p after) — business mile…
🏛️UK Inheritance Tax Calculator
Free UK IHT calculator: estate value, home left to children, spouse context — nil-rate ban…
🇨🇦Canada Take-Home Calculator
Free Canadian salary calculator: gross to take-home with federal brackets, basic personal …
🇦🇺Australia Take-Home Calculator
Free Australian salary calculator: gross to take-home with stage-3 tax rates, Medicare lev…
🔥FIRE Number Calculator
Free FIRE calculator: annual expenses × 25 = your FIRE number, plus years-to-FI from your …
🏧Withdrawal Rate Calculator
Free withdrawal rate calculator: portfolio in, sustainable annual and monthly income out —…
🌅Retirement Drawdown Calculator
Free retirement drawdown calculator: savings, annual spending, returns and inflation — see…
📦Moving Cost Estimator
Free moving cost estimator: home size and distance in — DIY truck+gas vs professional move…
🏠Roommate Bill Split Calculator
Free roommate split calculator: rent, utilities and shared bills split fairly — equal shar…
🧾Subscription Audit Calculator
Free subscription audit: add every Netflix, Spotify, gym and app subscription — see the sh…
📦Amazon Fee Calculator
Free Amazon seller fee calculator: price and category in — referral fee (~8-15%), FBA fulf…
🔨eBay Fee Calculator
Free eBay fee calculator: sale price, category final value fee (~13.6% typical) and per-or…
🧶Etsy Fee Calculator
Free Etsy fee calculator: listing fee $0.20, 6.5% transaction fee, payment processing ~3% …
💹Reseller Margin Calculator
Free reseller profit calculator: buy cost, sale price, marketplace fees and shipping — net…
🏖️Vacation Accrual Calculator
Free PTO accrual calculator: annual allowance, hours worked and usage — see accrued vacati…
⏳Invoice Late Fee Calculator
Free late invoice calculator: invoice amount, due date and daily rate — interest owed, run…
💼Freelance Rate Calculator
Free freelance rate calculator: target salary + expenses + billable hours + taxes = your t…
🪙Crypto Profit Calculator
Free crypto profit calculator: buy price, sell price, amount and exchange fees (~0.1-0.5%)…
💰Dividend Yield Calculator
Free dividend yield calculator: share price and dividend in — yield %, annual income on yo…
⚖️Net Worth Calculator
Free net worth calculator: assets (cash, home, investments) minus debts — your true net wo…
🕌Zakat Calculator
Free Zakat calculator with 2026 nisab: enter gold, silver, cash, investments and liabiliti…
⚡Electricity Bill Calculator
Estimate your Pakistani electricity bill from units consumed: editable slab tariffs, taxes…
Health & Fitness
TDEE calories, pregnancy due date and ovulation calculators — private, instant and free.
TDEE & Calorie Calculator
Free TDEE calculator: find your daily calorie needs with the Mifflin-St Jeor formula, plus…
🤰Pregnancy Due Date Calculator
Free pregnancy due date calculator: estimated due date from your last period, current week…
🌸Ovulation Calculator
Free ovulation calculator: predict your fertile window and next period from cycle length a…
📊Body Fat Calculator
Free body fat calculator using the US Navy tape method: measure neck, waist (and hips for …
🥗Macro Calculator
Free macro calculator: enter your daily calories and goal (cut, maintain, bulk) to get exa…
⚖️Ideal Weight Calculator
Free ideal weight calculator: Devine, Robinson and Miller formulas plus the healthy BMI ra…
💧Water Intake Calculator
Free water intake calculator: your daily hydration target based on weight, activity and cl…
❤️Heart Rate Zone Calculator
Free heart rate zone calculator: max heart rate and all 5 training zones using the accurat…
🏋️One Rep Max Calculator
Free 1RM calculator: estimate your one-rep max from any weight × reps set using Epley and …
🩺Blood Pressure Checker
Free blood pressure checker: enter systolic & diastolic readings to see your AHA category …
😴Sleep Cycle Calculator
Free sleep cycle calculator: wake up between sleep cycles, not mid-dream. Enter bedtime or…
SEO & Marketing
Meta tags, UTM links, robots.txt, slugs, keyword density and readability — the on-page SEO toolkit.
Meta Tag Generator
Free meta tag generator: build SEO title, description, keywords, canonical, Open Graph and…
🔗UTM Link Builder
Free UTM link builder: add utm_source, utm_medium and campaign parameters to any URL for c…
🤖Robots.txt Generator
Free robots.txt generator: allow or block search engines, disallow private folders, add si…
🔗URL Slug Generator
Free URL slug generator: turn any title into a clean, lowercase, SEO-friendly URL slug. Ac…
🔍Keyword Density Checker
Free keyword density checker: analyze single words and 2-word phrases with counts and perc…
📖Readability Checker
Free readability checker: score your text with the Flesch Reading Ease test, average sente…
#️⃣Hashtag Generator
Free hashtag generator: create keyword-based hashtag sets for Instagram, TikTok, YouTube, …
✍️AI Caption Generator
Free caption generator for Instagram, TikTok, LinkedIn and X: topic + tone in, scroll-stop…
💡AI Content Idea Generator
Free content idea generator: enter your niche, get 30 days of video/post ideas across prov…
👤AI Bio Generator
Free bio generator: create a polished Instagram, TikTok, X or LinkedIn bio in seconds — na…
📧Cold Email Generator
Free cold email generator: goal and context in — short, personal outreach emails out (sale…
Developer Tools
JSON formatter, regex tester, Base64, hashes, JWT, cron and more — built for daily dev work.
JSON Formatter
Free JSON formatter and validator: beautify messy JSON, minify for production, validate sy…
🔀CSV to JSON Converter
Free CSV to JSON converter: convert spreadsheet exports to JSON arrays. Handles quoted fie…
🔍Regex Tester
Free regex tester: test JavaScript regular expressions with live match highlighting and ca…
🔤Base64 Encoder / Decoder
Free Base64 encoder and decoder with full UTF-8 (Unicode/emoji) support. Encode text to Ba…
🌐URL Encoder / Decoder
Free URL encoder/decoder: percent-encode special characters for safe links, or decode %20-…
#️⃣Hash Generator (SHA-256)
Free SHA hash generator: create SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text u…
🆔UUID Generator
Free UUID v4 generator: create one or bulk-generate hundreds of cryptographically random u…
⏱️Epoch Timestamp Converter
Free Unix timestamp converter: convert epoch seconds/milliseconds to human dates and back,…
🎟️JWT Decoder
Free JWT decoder: decode JSON Web Token header and payload, inspect expiry (exp) and issue…
⏰Cron Expression Generator
Free cron expression generator: build crontab schedules with presets or custom fields, wit…
🔢AI Token Counter
Free AI token counter: estimate tokens for ChatGPT, Claude and Gemini, and calculate API c…
🧪Fake Person Generator
Free fake person generator: create complete fictional test profiles — name, birthday, job,…
📧Fake Email Generator
Free fake email generator: create realistic-format placeholder email addresses for testing…
✅Credit Card Validator
Free credit card validator: check if a card number is structurally valid (Luhn algorithm),…
📱Phone Number Validator
Free phone number validator: clean, validate and format numbers to E.164 international sta…
📨Email Validator
Free email validator: check address syntax (RFC-style), spot disposable-domain signups, an…
📚 Free guides (from our research)
DV Lottery Photo Requirements (2026): The Complete 600×…
Exact DV lottery photo rules: 600×600 pixels, under 240KB, head 50–69%, white background. …
✈️EU261 / UK261 Flight Compensation: The Free DIY Claim G…
Delayed 3+ hours, cancelled or denied boarding in the EU/UK? How much you're owed (€250–60…
🔒No-Upload Online Tools: The Privacy-First Way to Get Th…
Server-based tools copy your files to unknown computers. Browser-based (client-side) tools…
🧾GST & VAT for Freelancers: The Plain-English Guide (202…
Freelancer's plain-English guide to GST/VAT: adding vs removing tax, reverse charge, what …
🧑💻The Everyday Developer Cheat-Sheet: JSON, Base64, JWT, …
The practical dev cheat-sheet: pretty-print JSON, decode Base64 (UTF-8 safe), read JWT cla…
Why Toolfyra is different
- 100% private — your files and data are processed on your device and never uploaded.
- Blazing fast — no frameworks, no bloated pages; loads instantly even on slow connections.
- Truly free — no accounts, no watermarks, no daily limits.
- Mobile first — designed for phones, works everywhere.
Social & Video
Download YouTube thumbnails and build social links in seconds.
YouTube Thumbnail Downloader
Free YouTube thumbnail downloader: paste any video link and view/download its thumbnails i…
💵YouTube Money Calculator
Free YouTube money calculator: estimate ad earnings from monthly views and RPM. See realis…
❤️Engagement Rate Calculator
Free engagement rate calculator: compute ER% by followers or reach from likes, comments an…
📱Instagram Line Break Tool
Free Instagram line break tool: keep blank lines in your captions. Instagram deletes norma…
✨Fancy Font Generator
Free fancy font generator: turn text into bold, italic, monospace, circled and small-caps …
🎬Universal Downloader
Free universal downloader: paste a link from YouTube, TikTok, Vimeo, Dailymotion or Reddit…
🎬AI Script Generator
Free video script generator: turn any topic into a structured YouTube, TikTok or Reels scr…
📺YouTube Description Generator
Free YouTube description generator: build SEO descriptions with hooks, keywords, timestamp…
💡Video Ideas Generator
Free video ideas generator: paste a YouTube/TikTok link or topic and get 15 same-niche vid…
📋Video Copier Blueprint
Free video copier blueprint: paste a video link, get the full remake structure — hook form…
🎬Slideshow Video Maker
Free slideshow video maker: turn photos and text into a real video file in your browser — …