Are the UUIDs cryptographically secure?

Yes. The random values come from a cryptographically secure source provided by the browser.

Can I generate UUIDs without hyphens?

The output uses the standard form with hyphens. You can remove them afterward with the Text Cleaner tool.

Can duplicates occur?

The chance of two randomly generated UUID version 4 values being identical is extremely small for ordinary use.

UUID Generator

Generate one or more UUID version 4 identifiers using cryptographically secure randomness in your browser.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Create standard UUID version 4 identifiers using cryptographically secure randomness provided by the browser. Generate one identifier or several thousand at once in the standard lowercase format with hyphens.

How to use

Cryptographically secure UUID version 4 generation
Generate one or several identifiers
Copy all results or download them as a text file
Standard lowercase format with hyphens
Choose the quantity: Enter how many UUIDs you want to generate.
Generate: Select Generate to create the list.
Copy or download: Copy the results or download them as a text file.

Examples

Create primary keys for SQLite or IndexedDB
Generate identifiers for application testing
Create several user identifiers for sample data
Generate unique file names

Limitations

Only random UUID version 4 identifiers are supported
Generating a very large quantity may take slightly longer
The UUIDs are generated directly in your browser and are not sent to a server.

FAQ

Are the UUIDs cryptographically secure?: Yes. The random values come from a cryptographically secure source provided by the browser.
Can I generate UUIDs without hyphens?: The output uses the standard form with hyphens. You can remove them afterward with the Text Cleaner tool.
Can duplicates occur?: The chance of two randomly generated UUID version 4 values being identical is extremely small for ordinary use.