UUID v4 Generator

Cryptographically random UUIDs (version 4) — single or in bulk, generated on your device.

Quick answer: Free UUID v4 generator: create one or bulk-generate hundreds of cryptographically random unique identifiers. Copy individually or all at once.

How many UUIDs?

x

How to use

Open this page on any device — no signup needed.
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Get your result instantly — nothing is uploaded.

About this tool

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.

FAQ

Can UUIDs collide?

Practically never — generating a duplicate requires generating ~2.7 quintillion v4 UUIDs.

Are they secure as secrets?

v4 is random enough to be unguessable, but for tokens use 256-bit random and store hashed.

Uppercase or braces?

Lowercase plain is the convention; strip hyphens for DB columns with length limits.

People also searched

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