Toolorio

UUID Generator

Generate one or more random UUID v4 identifiers instantly, using your browser's built-in cryptographic random number generator.

4c96c462-f1f9-469b-8172-529cdc2ef31d
568b7dde-94a2-4565-befa-a46420be79e7
fa83a49e-8303-4160-b6b9-587fc8663c41
e0427630-8cdd-4ec1-904d-3802345a39da
bd76d7ad-1a2f-4fed-84e1-48bbf882f5b9

Your files are processed locally in your browser. They are not uploaded to our servers.

How to use

  1. Set how many UUIDs you want.
  2. Click Generate.
  3. Copy a single UUID or all of them at once.

What is this tool?

UUID Generator creates version 4 universally unique identifiers using the Web Crypto API's cryptographically secure random number generator. Each UUID is a 128-bit value formatted as 32 hexadecimal digits, virtually guaranteed to be unique. Everything runs locally in your browser.

Common uses

  • Creating unique IDs for database records
  • Generating test data for development
  • Producing unique keys for API requests or tracking
  • Creating unique filenames or session identifiers

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FAQ

Are these UUIDs guaranteed to be unique?

Version 4 UUIDs use 122 random bits, making collisions astronomically unlikely in practice.

How many UUIDs can I generate at once?

You can generate up to 50 at a time and copy them all with one click.

Are the UUIDs sent to a server?

No, they're generated entirely in your browser using the Web Crypto API and never leave your device.