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FizzKit

UUID Generator

Produce RFC 4122 version-4 UUIDs using the browser's crypto API. Supports bulk generation, uppercase output, and hyphen-free formats.

Runs locally in your browser
Generated UUIDs
Output will appear here…
Count
10
Version
v4
Format
standard
Size
0 B
UUIDs at once (max 500)

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About UUID Generator

Produce RFC 4122 version-4 UUIDs using the browser's crypto API. Supports bulk generation, uppercase output, and hyphen-free formats.

UUID Generator is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

Version 4, which is purely random. Collision probability is negligible (2^-122 per pair).