UUID v4 Generator
Generate one or multiple universally unique identifiers (UUID v4). Runs entirely in your browser using the Web Crypto API.
Generate UUIDs
Generated UUIDs
Generated locally using crypto.randomUUID() or Web Crypto API. Nothing is sent to any server.
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 32 hexadecimal digits in 5 groups separated by hyphens: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
- UUID v4 is randomly generated, making collisions statistically impossible
- Widely used for database primary keys, session tokens, and API resource IDs
- Version 4 is indicated by the digit 4 in the third group
- The variant bits in the fourth group are always 8, 9, a, or b