UUID Generator Online

Processes input in your browser | Privacy policy

About this tool

This free online UUID generator creates random version 4 UUIDs (also called GUIDs in many systems) for databases, logs, test data, and distributed apps. Click Generate to get a new UUID instantly—all processing runs in your browser.

How to use this tool

1. Click Generate UUID.
2. A new version 4 UUID appears in the output area.
3. Click Copy to paste it into your code, database, or test fixture.

Examples

Generated example:
550e8400-e29b-41d4-a716-446655440000

FAQ

How do I generate a UUID online?

Click Generate UUID, then copy the UUID v4 value. Nothing to paste—all processing runs in your browser.

Is this a free online UUID generator?

Yes. This UUID generator is free, requires no signup, and does not store your values.

What UUID version is used?

This tool generates random version 4 UUIDs (RFC 4122).

Is a UUID the same as a GUID?

In practice, yes for most developers. GUID usually means the same 128-bit identifier format; this tool outputs standard UUID v4 strings.

Is this a UUID decoder?

No. This page only generates new UUIDs. It does not decode or parse existing UUIDs. For token inspection, try the JWT Decoder.

Are these UUIDs guaranteed unique?

Collisions are extremely unlikely for UUID v4 and are not a practical concern in normal applications.

Common use cases

• Generate unique IDs for database seeds or test data.
• Create correlation IDs for logging and tracing.
• Produce UUID v4 values for API mocks and fixtures.

Limitations

This tool generates random UUID v4 values only. It does not validate or parse existing UUIDs.

Privacy note

This tool is designed to process input directly in your browser. Do not paste passwords, private keys, or highly sensitive data into any online tool unless you fully understand how it processes data. See our privacy policy.

Last updated: July 31, 2026