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UUID Generator

Generate random RFC 4122 version 4 UUIDs — one or many at once.

Generate UUIDs

UUIDs are generated locally with a cryptographically secure random source.

How to use the UUID Generator

  1. Choose how many UUIDs you need.
  2. Optionally switch to uppercase or wrap them in braces.
  3. Click Generate and copy the results.

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Frequently Asked Questions

Common questions about the free online uuid generator.

A UUID (universally unique identifier) is a 128-bit value used to identify information in computer systems without a central authority.
It generates version 4 UUIDs, which are created from random numbers.
Version 4 UUIDs have 122 random bits, so the chance of a collision is astronomically small in practice.
Yes, you can generate up to 500 UUIDs in a single click.
No, they are generated locally in your browser using a secure random source.
GUID is Microsoft's term for the same concept. They are interchangeable.
Yes. The generator is fully responsive and works on desktop, tablet and phone.
Yes, it is completely free with no account needed.

Last updated: October 10, 2026