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UUID Generator

Generate random UUIDs.

    Version 4 (random) UUIDs, generated on your device with the Web Crypto API. Reload or press Generate for a fresh set.

    Runs entirely in your browser — nothing you enter is uploaded or sent to a server.

    Version-4 UUIDs are random, so a clash is astronomically unlikely but never truly impossible — perfect as identifiers, but a UUID isn't a secret, so don't use one as a security token. Read our full disclaimer.

    About this tool

    A UUID (Universally Unique Identifier) is a 128-bit value written as 36 characters, used as a practically collision-free ID for database rows, correlation IDs, and test fixtures. This tool generates version-4 (random) UUIDs using the Web Crypto API, so they're cryptographically strong. Generate as many as you need and copy them individually or all at once.

    What you get

    Each value looks like 3f2504e0-4f89-41d3-9a0c-0305e82c3301 — 8-4-4-4-12 hex digits, with the version 4 marker and variant bits set per RFC 4122.

    How to use

    1. 1Choose how many UUIDs you want (1–50).
    2. 2Press Generate to create a fresh set.
    3. 3Copy a single UUID, or use Copy all to grab the whole list.

    Features

    • Version-4 (random) UUIDs from the cryptographically secure Web Crypto API.
    • Generate anywhere from 1 to 50 in a batch.
    • Copy a single UUID, or the whole list at once.

    Frequently asked questions

    Are these UUIDs safe to use as database keys?

    Yes. Version-4 UUIDs are generated from cryptographically strong random numbers, so the chance of a collision is negligible for typical use.

    What version of UUID does this generate?

    Version 4 (fully random), the most common general-purpose type, formatted per RFC 4122.

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