UUID Generator
Generate random RFC 4122 version 4 UUIDs.
About UUID Generator
Generate random UUIDs (also called GUIDs) online for free, one at a time or in bulk. This tool produces version 4 UUIDs using your browser's built-in crypto.randomUUID API, which follows the RFC 4122 standard and gives you 122 bits of randomness - enough that collisions are, for all practical purposes, impossible. UUIDs are perfect for database primary keys, distributed system identifiers, API request IDs, and file names that must never clash. Everything is generated locally in your browser, so you can copy a single ID or an entire batch instantly, with no signup and no limits.
How to use this tool
- 1Choose how many UUIDs you want to generate.
- 2Click Generate to create the identifiers.
- 3Copy a single UUID or copy them all at once.
Frequently asked questions
What kind of UUIDs does this generate?
It generates random version 4 (v4) UUIDs using your browser's crypto.randomUUID API, which follows the RFC 4122 standard.
Are the UUIDs guaranteed to be unique?
Version 4 UUIDs are random with 122 bits of entropy, making practical collisions astronomically unlikely.