UUID v4
Version 4 UUIDs are random identifiers commonly used for fixtures, tests, distributed records and temporary IDs.
Browser-based developer tools
UUID Generator
Generate random UUID v4 values for tests, fixtures, database rows and API examples.
UUIDs are generated locally with browser cryptographic randomness when available.
Reference notes
Random identifiers for development
Local generation
Values are generated in the browser and are not requested from a server.
Collision safety
UUID v4 collisions are extremely unlikely, but production systems should still enforce uniqueness where it matters.