Developers
Primary keys in databases, session IDs, request tokens and analytics events.
Version
CountFrom 1 to 100
Result
UUID Generator
Generates UUID (Universally Unique Identifier) in v4, v1 formats and ULID. Choose a format, set the count and click Generate.
UUID v4 is random and suitable for most tasks. UUID v1 contains a timestamp. ULID is lexicographically sortable and UUID-compatible.
About
UUID is used everywhere as a globally unique identifier.
Databases
UUID v4 works great in distributed systems where auto-increment is not possible. ULID preserves time-based sorting.
Testing
Quickly generate a list of unique identifiers for fixtures, mocks and load tests.