UUID Generator (v4)
Generate random RFC-4122 version-4 UUIDs in bulk.
Click Generate to create UUIDs.
Generate cryptographically random version-4 UUIDs (also called GUIDs) one at a time or in bulk. Useful for database keys, request IDs and test data. Generation uses the browser's secure crypto API.
How to use the UUID Generator
- Choose how many UUIDs you need.
- Click Generate.
- Copy a single UUID or the whole list.
Frequently asked questions
Are these UUIDs unique?
Version-4 UUIDs are random 122-bit values. The chance of a collision is astronomically small, so for practical purposes they are unique.
Are they cryptographically secure?
Yes — generation uses crypto.randomUUID() / crypto.getRandomValues() in your browser, which is a cryptographically secure random source.