Generate UUID v4 identifiers

For filling tests, prototypes or sample records with distinct identifiers, UUID generator creates UUID v4 values ready to paste.

Generate UUID v4 identifiers ready to paste into tests, sample data or application prototypes. You get the result directly in your browser.

How to use

Open the tool and run the generation action to create a UUID v4 identifier.
Copy the value shown in the result area.
Run the generation again when you need several distinct identifiers.
Clear the result before preparing a new batch so values do not get mixed up.

Example

You are preparing test data for an application. Generate a few UUID v4 values, copy them into your test file, and check that each row receives a different identifier before running your scenarios.

Limits and formats

A UUID v4 is a random identifier; it should not be used as a password or secret.
Generation alone does not absolutely guarantee uniqueness, though collisions are extremely unlikely.
The tool does not store generated identifiers, so copy them before leaving the page.
No file format is accepted here because the tool only produces text.

Where processing happens

The generation runs in your browser. The identifiers produced stay on your device and are not sent anywhere. No account is required to get a value.

Frequently asked questions

Can I use these UUIDs in a database?

Yes, a UUID v4 is often used as a technical identifier. Check your database column type and constraints before inserting one.

Why do two generated UUIDs look so different?

They are produced randomly in the v4 format. That variety is expected and makes each value hard to guess from another.

How many identifiers can I generate?

The tool creates values on demand in your browser. Generate as many as your test needs, then copy the batch before closing the page.

Can I use a generated UUID as a password?

No. A UUID v4 is a random identifier, but it should not be used as a password or secret. Use it for technical identification where a unique value is useful, then copy it before leaving the page. Generation runs in your browser and the identifiers stay on your device.

Are generated UUIDs saved if I close the page?

No. The tool does not store generated identifiers, so copy them before leaving the page. Generation runs in your browser and the identifiers stay on your device. Run the generation again when you need several distinct values, and clear the result before preparing a new batch. No account is required to get a value.