ULID

ULID Generator

Generate sortable, lexicographically ordered, unique ULID identifiers.

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About this tool

Create ULIDs (Universally Unique Lexicographically Sortable Identifiers) right in your browser using the crypto API for randomness.

Why are ULIDs sortable?

The first 48 bits encode the creation time in milliseconds, so ULIDs generated later sort after earlier ones as plain text.

How random is each ULID?

The last 80 bits come from crypto.getRandomValues, giving strong, collision-resistant randomness generated locally.