ULID Generator
Generate sortable ULIDs locally with timestamp prefixes and browser randomness for IDs, fixtures, and test data.
ULIDs are sortable unique identifiers with a timestamp prefix.
This generator creates ULIDs locally for fixtures, logs, and non-security IDs.
Use modest batches
Generate only the number of IDs you need for a test or fixture.
Use server IDs in production
Production database IDs should usually be generated by your application or database.
Example
A ULID looks like 01HX... and is 26 characters long.
Assumption
IDs are for test data, fixtures, or local planning.
Limitation
This is not a replacement for authenticated server-side token generation.
Fixtures
Create sortable sample IDs.
Logs
Generate local event IDs.
Testing
Populate mock data.
Docs
Show realistic ID examples.
What is a ULID?
A ULID is a 26-character identifier with a timestamp component and random component.
Are ULIDs sortable?
Yes. The timestamp prefix means ULIDs generally sort by creation time.
Does this use a backend?
No. ULIDs are generated in your browser.
Should I use this for security tokens?
No. Use purpose-built server-side token generation for authentication and security-sensitive workflows.
Suggested workflow
Identifier workflow
Generate ULIDs, compare UUIDs, then create hashes when needed.