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UUID Generator

Generate random version-4 UUIDs, one or in bulk, ready to copy.

About the UUID Generator

A UUID is a 128-bit identifier used as a unique ID for database records, files, sessions and API resources. This generator creates proper random version-4 UUIDs — one at a time or in bulk — using your browser's secure random generator, ready to copy straight into your code or database.

How to use it

  1. Choose how many UUIDs you need.
  2. Press Generate.
  3. Copy a single UUID or the whole list.

Frequently asked questions

What is a version 4 UUID?

A v4 UUID is built almost entirely from random numbers — 122 of its 128 bits are random — which is why collisions are practically impossible without any central registry assigning them.

Are UUID and GUID the same thing?

Effectively yes. GUID is Microsoft's name for the same 128-bit unique identifier format, widely used in Windows and .NET; the values are interchangeable.

Can two generated UUIDs ever collide?

In practice, no. You would need to generate billions of UUIDs per second for years before a collision became likely — that is the point of the format.

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