UUID Generator

Generate random UUID v4 (GUID) values with your browser's cryptographic randomness. Nothing is sent or stored.

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About UUIDs

A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit value written as 32 hexadecimal digits in the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. Version 4 UUIDs are almost entirely random, which makes them practically collision-free — you can generate them independently on different machines without coordinating, and they still won't clash.

They're used everywhere: database primary keys, request and trace IDs, file names, session tokens, and more. This generator uses crypto — your browser's cryptographically secure random source — and runs entirely on your device, so the values are never transmitted or logged.