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How to use UUID / GUID Generator

Click generate, and the tool creates an RFC 4122 version 4 UUID/GUID — generate as many as you need.

Frequently asked questions

What is a UUID?

A Universally Unique Identifier — a 128-bit label guaranteed to be unique across space and time.

What is UUID v4?

Version 4 UUIDs are randomly generated. Version 1 uses timestamp+MAC address.

What is the collision probability?

For v4 UUIDs, the probability of collision is astronomically low — 1 in 5.3×10³⁶.

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