Developer tool

UUID Generator

Generate random v4 UUIDs, one or thousands at a time.

Free Runs in your browser

About this tool

A UUID is a 128-bit ID that is practically guaranteed to be unique. This tool creates random version 4 UUIDs using your browser’s secure random number generator.

How to use UUID Generator

  1. Choose how many UUIDs you need.
  2. Pick uppercase or remove hyphens if needed.
  3. Copy the list.

Questions people ask

Can two UUIDs ever be the same?

In theory yes, but the chance is so small that it is ignored in practice. You would need billions of IDs per second for many years.

What is the difference between UUID and GUID?

They are the same thing. GUID is the name Microsoft uses.

Are these UUIDs secure?

They use crypto.randomUUID, which is cryptographically random.

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