UUID / GUID Generator

Generate cryptographically random version-4 UUIDs, one or thousands at a time.

How to use the UUID Generator

Version-4 UUIDs are 128-bit identifiers made from 122 random bits, so collisions are practically impossible. They're generated with your browser's secure random number generator, never on a server.

Frequently asked questions

Is a GUID the same as a UUID?

Yes. GUID is Microsoft's name for the same 128-bit identifier.

Can two UUIDs ever be the same?

In theory, but you'd need to generate billions per second for decades to have a meaningful chance.

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