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CUID2 Generator

Generate collision-resistant CUID2 IDs.

CUID2 IDs

    CUID2 (by Eric Elliott) generates collision-resistant IDs without sequential leakage. Good for distributed apps. The original CUID format leaked timestamp data, which is why CUID2 randomized the structure. URL-safe lowercase alphabet only.

    About

    CUID2 by Eric Elliott is a non-leaking, collision-resistant ID format. Lowercase URL-safe, no timestamp leakage, designed for distributed apps. Pick the length (default 24).

    How to use

    1. Pick the length.
    2. Generate.

    FAQ

    Why CUID2 over UUID?+

    CUID2 IDs don't leak creation time the way ObjectID and ULID do. Smaller URL-safe alphabet means shorter strings for the same uniqueness. Generally better for shared / public IDs.