UUID Generator
Generate random version-4 UUIDs in bulk. Pick how many and which format — they're created locally with your browser's secure random source.
What this tool does
A UUID (Universally Unique Identifier) is a 128-bit value written as 32 hexadecimal digits in the pattern 8-4-4-4-12. This generator produces version 4 UUIDs, where the digits are almost entirely random. That randomness makes collisions vanishingly unlikely, so you can mint IDs on the client, in a database, or across services without a central coordinator.
When to use it
- Primary keys or record IDs that don't reveal a count or order
- Idempotency keys, request IDs, and correlation IDs in logs
- Filenames or tokens that must not clash across machines
How the randomness works
UUIDs are generated with crypto.randomUUID() — your browser's cryptographically secure random number generator — so they're suitable for identifiers. They are not a substitute for a password or secret key. Every value is created on your device; nothing is requested from or sent to a server.