UUID / ULID Generator
Generate UUID v4 or ULID identifiers instantly in your browser. Your data never leaves your device.
● This tool runs entirely in your browser. No data is uploaded or stored.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time, commonly used as database primary keys and API identifiers.
What is a ULID?
A ULID (Universally Unique Lexicographically Sortable Identifier) is a sortable alternative to UUID with millisecond precision, making it ideal for time-ordered data.
Are generated UUIDs truly unique?
Yes. UUID v4 uses cryptographically secure random generation with a collision probability so low it is practically zero.