About the UUID Generator
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier used to label data without a central authority — for database primary keys, distributed systems, file names, and more. Version 4 UUIDs are generated from random numbers, making collisions practically impossible.
This generator creates cryptographically-random UUID v4 values using your browser's secure crypto API. Generate one or many at a time and copy them with a click.
Features
- Generate RFC-4122 version 4 UUIDs
- Create up to 100 at once
- Uses the browser's secure random source
- Copy individually or all at once
How to use
- Choose how many UUIDs you want.
- Click Generate.
- Copy a single UUID or all of them.
Frequently asked questions
Are these UUIDs unique?
Version 4 UUIDs are generated from 122 random bits, so the chance of a collision is astronomically small — safe to use as unique identifiers in practice.
Are they cryptographically secure?
Yes. They use the browser's crypto.randomUUID / getRandomValues, which is a cryptographically secure random number generator.