Data tool

UUID Generator

Generate one or many v4 UUIDs using the browser’s cryptographic random source, in lower or upper case, with or without hyphens.

How many

Uppercase Hyphens

UUIDs (version 4)

Generated with crypto.randomUUID(), which uses the browser’s cryptographically secure random source.

Runs in your browser

This tool is pure client-side JavaScript. Nothing you enter is sent to this server or anywhere else — you can verify it in your browser’s network tab.

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