UUID Generator
Runs entirely in your browser
Generate random, RFC 4122-compliant UUID v4 identifiers directly in your browser.
Up to 1000 at a time.
What is UUID Generator?
UUID Generator creates version 4 Universally Unique Identifiers — 128-bit values commonly used as database keys, request IDs, session tokens and object identifiers where you need a unique value without a central authority assigning it.
How to use UUID Generator
- Choose how many UUIDs you need.
- Optionally toggle uppercase or remove hyphens.
- Click Generate, then copy the results.
Features
- Generates RFC 4122-compliant UUID v4 values.
- Generate up to 1000 UUIDs at once, one per line.
- Uses a cryptographically secure random source, not Math.random().
- 100% client-side — nothing is sent to a server.
Frequently Asked Questions
What UUID version does this generate?
UUID version 4 — randomly generated identifiers, the most common type used in application code and databases.
How random are these UUIDs?
They're generated with the browser's crypto.getRandomValues() API (falling back to crypto.randomUUID() where available), which is cryptographically strong — not Math.random().
Can two generated UUIDs collide?
In practice, no. UUID v4 has 122 random bits, so the chance of any collision is astronomically small even across billions of generated IDs.
Is my data uploaded anywhere?
No. UUIDs are generated entirely in your browser and never sent to a server.