UUID Generator

Generate up to 100 cryptographically secure random UUIDs (version 4) at once — for database keys, request IDs, test fixtures and more.

    How to use this tool

    1. Choose how many UUIDs you need (1 to 100).
    2. Press “Generate UUIDs”.
    3. Copy a single UUID with its button, copy them all, or download the list.

    Key features

    • Version 4 UUIDs from a cryptographically secure random source.
    • Bulk generation — up to 100 per click.
    • One-click copy for individual UUIDs or the whole list.
    • Generated in your browser with the Web Crypto API.

    Frequently asked questions

    A UUID v4 is a 128-bit identifier made of random bits, formatted like 3f2504e0-4f89-41d3-9a0c-0305e82c3301. The chance of two colliding is astronomically small.

    Yes. They are generated with your browser's crypto API (crypto.randomUUID / getRandomValues), not a predictable pseudo-random generator like Math.random().

    In theory yes, in practice no — with 122 random bits you would need to generate billions of UUIDs per second for longer than the age of the universe to have a meaningful chance of one collision.

    This tool runs entirely in your browser — your data is never sent to or stored on our server.

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