UUID Generator
Generate random v4 UUIDs, one at a time or in bulk. Runs entirely in your browser.
[ COUNT ]
1–1000, currently 1
[ OUTPUT ]
- // no UUIDs yet
About UUID Generator
A version 4 UUID is a 128-bit identifier with 122 random bits, written as 36 characters. Collisions are astronomically unlikely, which makes them a common choice for database keys and request IDs.
How to use it
- Open the tool to get a fresh UUID immediately.
- Generate another, or set a count for bulk output.
- Copy one value or the whole list.
Frequently asked questions
- Are these UUIDs suitable for production use?
- They are generated with crypto.getRandomValues, the browser's cryptographically secure RNG, and follow the RFC 4122 version 4 layout.
- What version are they?
- Version 4 (random). Versions 1 and 7, which embed a timestamp, are not produced here.
- Could two of these ever collide?
- In theory yes, but the probability is negligible — you would need to generate billions of UUIDs before a collision became likely.