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Toolorio

UUID Generator

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

eee1bdfe-67c5-483b-8c89-e605ba199191
73d66aa3-b163-4514-9ada-f95bf866d9a0
8d33f022-e6fe-42f5-acb2-f8c44179da68
91dc80d5-29eb-4b84-ba47-34c5025fcf6f
cf9b3ce6-27d7-4392-8635-5a3fca4217c7

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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

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.