FAHAQ

NanoID Generator

Generate compact, URL-safe unique IDs.

    URL-safe, collision-resistant IDs generated locally with your browser's crypto engine using unbiased rejection sampling.

    Free NanoID generator. Create compact, URL-safe, collision-resistant unique IDs with an adjustable size, one or many at a time. Implemented from scratch with your browser's crypto engine — nothing uploaded.

    How to use the NanoID Generator

    1. 01Set the ID size in characters (default 21).
    2. 02Choose how many IDs to generate.
    3. 03Click Generate and copy a single ID or the whole list.

    Frequently asked questions

    What is a NanoID?

    A NanoID is a short, URL-safe unique identifier built from a 64-character alphabet. At the default size of 21 characters it's collision-resistant enough to replace UUIDs in most systems.

    How is randomness handled?

    IDs use crypto.getRandomValues with rejection sampling so every character is equally likely — no modulo bias. Everything runs locally in your browser.