What is UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. UUID v4 is randomly generated and statistically unique — the probability of generating the same UUID twice is virtually zero.
Use Cases
- Database Keys - Primary keys that don't reveal information
- API Authentication - Session tokens and API keys
- Distributed Systems - Generate IDs without a central server
- Software Licensing - Unique activation keys
FAQ
Is this truly random?Yes, UUIDs are generated using the browser's crypto.getRandomValues() for cryptographically secure randomness.
What's the format?UUID v4 format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where y is 8, 9, a, or b.