About UUID Generator
A UUID is a 128-bit identifier designed to be unique without a central authority, which makes it useful for database keys, distributed systems, and request tracing. Version 4 UUIDs are generated from random data rather than timestamps or hardware addresses.
How to use
- Choose how many identifiers you need.
- Toggle uppercase or hyphens to match your target format.
- Copy an individual UUID or the whole batch at once.
Frequently asked questions
Can two UUID v4 values collide?
It is theoretically possible but practically negligible. With 122 random bits, you would need to generate billions of UUIDs per second for decades before a collision became likely.
Are these cryptographically random?
Yes. They come from your browser's crypto API, which draws on the operating system's secure random source rather than a predictable pseudo-random generator.