Fresh, unique identifiers on demand
UUID v4 (universally unique identifier) values are 128-bit identifiers, typically shown as 32 hexadecimal digits separated into 5 groups. They’re ideal for database primary keys, request IDs, or any identifier you need to be effectively unique without coordinating with a central source.
How to use
- Choose how many UUIDs you want.
- Click Generate.
- Copy an individual UUID, copy them all, or download a text file.
Frequently asked questions
About the UUID Generator
A UUID is a 128-bit identifier that is, for all practical purposes, unique without any central coordination. The UUID Generator creates version 4 UUIDs using your browser’s cryptographically secure random number generator.
Nothing is sent to a server, and no identifiers are stored.
How to use it
- Choose how many UUIDs you need.
- Generate them.
- Copy a single value or download the list as a text file.
Common uses
- Creating primary keys or test fixtures for a database.
- Generating correlation or request IDs for logging.
- Producing unique file or session identifiers.
Tips for better results
- Version 4 UUIDs are random, so they do not sort by creation time. Use a time-ordered scheme if you need that.
- The chance of two random UUIDs colliding is so small that it is ignored in practice.
- UUIDs are identifiers, not secrets. Do not use one as a password or access token on its own.
Good to know
- Only random version 4 UUIDs are produced.
- Generating very large batches in one go may be slow on low-powered devices.
Built and maintained by Neha Singh. Found a problem or have a suggestion? Email hello@zevqi.com.