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ULID Generator
Generate sortable, unique ULIDs — a timestamp-ordered alternative to UUIDs.
Free · No sign-up · Updated August 2026
ULIDs are 26-character, lexicographically sortable IDs — the first 10 chars encode the timestamp, so they sort by creation time (unlike UUIDs).
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
How is a ULID different from a UUID?＋
A ULID is 26 characters and sorts by creation time, because its first 10 characters encode the timestamp.
Are they unique?＋
Yes — the random portion uses the browser's secure random source, making collisions extremely unlikely.