Free · No signup · Runs in your browser

UUID Generator

Generate cryptographically-random version 4 UUIDs for keys, database records and sessions — one or in bulk.

UUID Generator

Cryptographically-random v4 UUIDs for keys, records and sessions.

Features

Everything UUID does

Real randomness from the Web Crypto API — not Math.random — so your identifiers are safe to rely on.

Crypto-strong

Uses crypto.randomUUID() / getRandomValues for genuinely unpredictable version 4 UUIDs.

Generate in bulk

Produce 1, 5 or 10 at a time and copy each individually.

Formatting options

Toggle uppercase and wrapping braces {…} to match your platform's convention.

Instant & unlimited

Generate as many as you like, free, with no rate limits.

How to use

Generate a UUID in three steps

1

Choose how many you need — 1, 5 or 10.

2

Set the format — uppercase and/or braces, if you want them.

3

Click Generate and copy any UUID from the list.

FAQ

Questions & answers

Everything you might wonder about this tool.

01What version of UUID does this create?
Version 4 (random) UUIDs, the most common kind for keys and identifiers. 122 of the 128 bits are random, giving an astronomically low collision chance.
02Are these UUIDs safe to use as unguessable tokens?
They are generated from a cryptographically secure random source, which makes them suitable as unpredictable identifiers, though a dedicated secret generator is better for passwords.
03Is any of my data uploaded to a server?
No. This tool runs entirely in your browser with JavaScript — your input never leaves your device, so it is safe to use with private tokens, config and source code.
04Is it free, and do I need an account?
Yes, it is completely free with no signup, no install and no usage limits. Open the page and it works instantly on desktop or mobile.
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