Work through the task
Generate UUID v4, UUID v7 or ULID identifiers in an explicit batch.
- Select a kind and a whole-number count.
- Inspect the identifier shape. UUID v7 and ULID contain generation time; ULIDs generated in one millisecond are not promised to be monotonic.
- Review the result before copying or downloading. Editing an input invalidates the previous result; keep an original if the transformation matters.
Example to check
A count of 3 produces three identifiers of the chosen kind, one per line.
Limits and output behavior
Supported batch size is 1–1,000. Randomness does not prove a finite batch is collision-free in every future system. These identifiers are not passwords or authorization tokens.
Troubleshooting
Choose a supported kind and a whole-number count 1–1,000. A time-bearing identifier exposes generation time; do not use identifiers as authentication secrets.
Questions
Are same-millisecond ULIDs guaranteed to be in generation order?
No. This implementation generates independent random suffixes and does not promise monotonic ULIDs.
Input and privacy
Processing runs in this browser. Inputs are not saved automatically. An explicitly chosen local draft, where offered, is plaintext storage on this device. Downloaded files, clipboard contents and browser extensions have separate retention behavior.