UUID Generator
Generate random UUID v4 identifiers, one or in bulk.
How to use UUID Generator
- 1Set how many UUIDs you need (1–1000).
- 2Click Generate.
- 3Copy a single UUID or download the full list.
Why use this tool
- Uses the browser's crypto.getRandomValues for cryptographically strong randomness.
- Bulk generation up to 1000 at once for seeding test data.
- Standard UUID v4 format, compatible with virtually every database and language.
Frequently asked questions
Are these UUIDs guaranteed unique?
UUID v4 has 122 random bits, making collisions astronomically unlikely in practice — this is the same standard used by databases and operating systems.
What's the difference between UUID and GUID?
They're effectively the same concept — GUID is Microsoft's term for the same 128-bit identifier format defined by the UUID standard.