Developer tool
Standalone tool pageUUID Generator
Generate random UUID v4 values locally for apps, databases, tests, and prototypes.
Result
First UUID
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How It Works
The tool uses crypto.randomUUID when supported, with a standards-style random v4 fallback for older browsers.
Example
A UUID looks like 9f1c2a77-28d4-4e0c-b4ea-6c8f3a879f8d.
Frequently Asked Questions
What UUID version does this generate?
This tool generates random UUID v4 values.
Are UUIDs generated locally?
Yes. UUIDs are generated in your browser using crypto.randomUUID when available.