Free UUID Generator (v4)

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value written as 32 hexadecimal digits in five groups, for example 550e8400-e29b-41d4-a716-446655440000. Version 4 UUIDs are generated from random data, so they are practically guaranteed to be unique without a central authority. They are used as database keys, request IDs, and file names.

How to use this UUID generator

Choose how many you need and click Generate. The tool produces that many version 4 UUIDs at once, ready to copy. Generation uses your browser cryptographic random source, so the values never leave your machine.

UUID FAQ

Are these UUIDs unique? Version 4 UUIDs draw 122 random bits, so the chance of a collision is negligible for any realistic number of IDs.

Which version is this? Version 4 (random). It is the most common choice when you just need a unique identifier.

Is generation safe and private? Yes. UUIDs are created in your browser with the built-in crypto random generator and are never uploaded.