UUID Generator
Generate one or many random, RFC 4122-compliant UUID v4 identifiers instantly, formatted exactly how you need them.
Your files are processed in your browser and never uploaded to any server.
How to use this tool
- 1Set how many UUIDs you need (up to 100 at once).
- 2Toggle hyphens and uppercase formatting as needed.
- 3Click Generate for a fresh batch.
- 4Copy a single UUID or all of them at once.
Frequently asked questions
How random are these UUIDs?+
They use your browser's cryptographically secure random number generator (crypto.randomUUID).
Can two generated UUIDs ever collide?+
It's theoretically possible but so unlikely in practice that UUID v4 is trusted for production systems worldwide.
UUIDs are used as unique identifiers for database rows, API resources, session tokens, and distributed system keys, because the odds of two randomly generated UUIDs colliding are astronomically small. This tool generates cryptographically random UUID v4 values using your browser's built-in secure random generator, in bulk if you need many at once for seeding test data. Toggle hyphens on or off and switch between upper and lowercase to match whatever format your database or codebase expects.