95 · Productivity

UUID Generator

Create random, standards-compliant version 4 UUIDs for database keys, test data and file names.

Generated on your device with the Web Crypto API.

How to use the uuid generator

  1. Choose how many UUIDs you need.
  2. Choose a format: uppercase, without hyphens, or in braces for Microsoft-style GUIDs.
  3. Copy them all, or select Generate new for a fresh batch.

About version 4 UUIDs

A UUID is a 128-bit identifier written as 32 hexadecimal digits. Version 4 UUIDs are random: 122 of the bits come from a secure random source, and the rest mark the version and variant. There are so many possible values that the chance of two ever colliding is negligible for practical purposes.

Examples

1 UUID

Something like 3b241101-e2bb-4255-8caf-4136c566a962

Uppercase, no hyphens

3B241101E2BB42558CAF4136C566A962

Questions

Is a GUID the same as a UUID?

Yes. GUID is Microsoft’s name for the same format.

Are these UUIDs unique?

They’re random, not registered, but the odds of a duplicate are astronomically small.

Can I use them as secrets?

They’re unpredictable, but they’re designed as identifiers. For passwords or keys, use the password generator.