No sign-up · Nothing to install

# Generate a UUID.
## Copy it with one click.

Click to copy

## About UUIDs

What is a UUID?
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier written as 32 hexadecimal digits, like f47ac10b-58cc-4372-a567-0e02b2c3d479. It is designed to be unique without a central authority.
What is UUID v4?
UUID v4 is generated from random numbers. It is the most common version and the default on this site, ideal for database keys, test data and request IDs.
What is the difference between UUID v4 and v7?
UUID v7 starts with a timestamp, so values sort by creation time. That makes it friendlier to database indexes than the fully random v4.
Is this UUID generator free and private?
Yes. It is free, needs no sign-up, and every UUID is generated in your browser; nothing is sent to a server.