ULID Generator
How to Use the ULID Generator
Generate one or more ULIDs for identifiers that combine time-sortable structure with randomness.
Practical Example
A generated ULID such as 01J... can be used as a unique record identifier whose leading portion reflects creation time ordering.
Factors That Affect the Result
Timestamp precision, random entropy, generator implementation and clock accuracy influence generated values and their ordering.
Frequently Asked Questions
What is a ULID?
A ULID is a 128-bit identifier encoded in a lexicographically sortable text format.
How is ULID different from UUID?
ULIDs are designed to sort roughly by creation time while still including randomness.
Are ULIDs guaranteed never to collide?
No finite identifier system can provide an absolute guarantee, but sufficient randomness makes collisions extremely unlikely in normal use.