ToolArc

UUID Generator

Generate cryptographically random UUID v4 identifiers in your browser. Bulk generation, copy and download - no server round-trips.

Runs in your browser
Loading UUID Generator...

How to use

  1. 1

    Choose how many UUIDs to generate.

  2. 2

    Click "Generate".

  3. 3

    Copy selected or all UUIDs, or download them as a text file.

How it works

UUIDs are built from the Web Crypto API - crypto.randomUUID where available, otherwise 122 bits of randomness from crypto.getRandomValues. Math.random is never used.

Frequently asked questions

Are the UUIDs truly random?

They use the browser's cryptographic random source, not a pseudo-random generator.

Are UUIDs unique?

The 122 random bits make collisions practically impossible - that is the point of UUID v4.

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