All tools/Generators

ULID Generator

Generate sortable, unique ULID identifiers. Runs entirely in your browser.

Generated ULIDs
    How this works & FAQ

    Each ULID is a 26-character identifier: the first 10 characters encode the current millisecond timestamp, and the remaining 16 are cryptographically random. Generating several at once produces IDs that sort in creation order.

    How is a ULID different from a UUID?

    A ULID is lexicographically sortable by creation time (like UUID v7), uses Crockford's Base32 (no ambiguous I, L, O, U characters), and is case-insensitive — often preferred for database primary keys and log IDs.

    Is this cryptographically secure?

    Yes, the random portion uses crypto.getRandomValues().