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Free Developer Tool

Nano ID Generator

Compact, URL-safe unique IDs with real cryptographic randomness. Pick a length, pick an alphabet, generate.

100% Free No signup Runs in your browser No uploads

    Uses crypto.getRandomValues, the same randomness source as the official nanoid library. Collision chance for 21-char IDs is negligible for ordinary use.

    Frequently asked questions

    What is a Nano ID?

    A tiny, URL-safe unique string identifier, an alternative to UUIDs when you want shorter IDs for database keys or public URLs.

    Are these IDs really random?

    Yes. They are generated with crypto.getRandomValues, a cryptographically strong random source, using the official nanoid masking algorithm.

    Can two IDs collide?

    With the default 21 characters from a 64-symbol alphabet there are 64^21 possibilities, so collisions are practically impossible in normal use.

    Preview

    Nano ID Generator tool preview
    Live preview of the Nano ID Generator tool running in your browser. Your data never leaves your device.

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