UUID Generator
Generate random v4 UUIDs in bulk.
- Runs in your browser
- Generators
How to use the UUID Generator
- 1A fresh UUID appears at the top. Click Generate for a new one.
- 2Use the slider to make up to 500 at once.
- 3Toggle uppercase, hyphens or a quoted list, then copy or save.
Questions
Which UUID version is this?
Version 4 (random), made with the browser's crypto.randomUUID, which uses a secure random source.
Can two UUIDs collide?
In practice, no. There are 2^122 possible values, so you'd need billions per second for many years before a collision becomes likely.
Are UUIDs good database keys?
They work well, but random v4 values spread out index writes. For heavy insert loads consider a time-ordered ID such as UUID v7.