UUIDs are generated using a cryptographically random algorithm (UUID v4), making collisions practically impossible.

What is a UUID used for?

UUIDs are used as unique identifiers in databases, APIs, and distributed systems.

UUID Generator

Generate UUID v4 values online. Create up to 100 cryptographically random universally unique identifiers instantly in your browser.

Count

Click Generate to create UUID v4 values.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. UUID v4 is randomly generated using cryptographically secure randomness.

Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

How to use this tool

Set the number of UUIDs to generate (1–100)
Click Generate
Copy individual UUIDs or use Copy All to copy the full list

Common use cases

Generating primary keys for database records
Creating unique session identifiers
Generating correlation IDs for distributed system tracing
Creating unique file names to prevent collisions
Seeding test data with unique identifiers
Generating API keys or token seeds (combine with hashing)

UUID v4 format

550e8400-e29b-41d4-a716-446655440000
         ^^^^                         Version 4
              ^^^^                    Variant bits

Notes

This tool uses crypto.randomUUID() which is cryptographically secure and available in all modern browsers.

Privacy

All processing happens in your browser. Nothing is transmitted.