UUID Generator

Create one or hundreds of random UUID v4 identifiers — generated on your device with the Web Crypto API.

About this tool

A UUID (universally unique identifier) is a 128-bit value that is practically guaranteed to be unique without any central registry — ideal for database keys, request IDs, file names and distributed systems. This tool generates version 4 UUIDs from cryptographically secure random numbers, directly in your browser.

How to use it

  1. Choose how many UUIDs you need (1–500) and the letter case.
  2. Click Generate UUIDs — a fresh, random batch appears every time.
  3. Copy the list and paste it wherever you need it.

Good to know

  • UUID v4 contains 122 random bits; the odds of a collision are astronomically small.
  • Generation is local — the randomness never touches a network, so it is safe to use offline (after the page loads) and for any sensitivity level.
  • Need a different flavour? Toggle the case, or post-process with the Text Case Converter.