UUID Generator
Generate cryptographically random version 4 UUIDs, one or many at a time, with a click. They're created securely in your browser using the Web Crypto API. Free, instant, no sign-up.
Choose how many and click Generate.
Frequently asked questions
A UUID (Universally Unique Identifier) is a 128-bit value, usually shown as 36 characters like 'f47ac10b-58cc-4372-a567-0e02b2c3d479'. Version 4 UUIDs are random and effectively unique, so they're widely used as database keys and IDs.
Yes — they're generated with the browser's cryptographically secure random number generator (crypto.randomUUID), so collisions are astronomically unlikely.
Yes — free, no sign-up, and generated entirely on your device.
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