What this tool does
Create UUID v4 identifiers for test records, request tracing or temporary objects. The tool displays five identifiers per batch for copying into test data.
How to use it
- Open the page to see five generated UUIDs.
- Copy the identifiers you need. Generate new UUIDs replaces the entire batch.
- For database keys, retain a unique constraint and handle collisions in your application.
Example
Format example: 550e8400-e29b-41d4-a716-446655440000 Group lengths: 8-4-4-4-12. This example is fixed; generated values vary.
Limits and common mistakes
Generation uses crypto.randomUUID and requires a supported browser in a secure context. A UUID identifies an object; it should not grant authorization to access it. Randomness reduces collision risk but does not replace database constraints.
Why use this tool?
Fast and private
Everything is processed locally in your browser. Nothing you enter is uploaded.
Works on every device
Responsive controls for desktop, tablet and mobile.
Frequently asked questions
Is my data stored?
Local processing does not upload your input. Some tools, such as the notepad, save content or preferences in this browser; clearing site data removes that local storage. Usage counters are described in the privacy policy.