UUID Generator

Generate universally unique identifiers (UUIDs) quickly and easily. Choose between UUID v1 (time-based) and v4 (random) and specify the number of UUIDs you need.

Generated UUIDs

Click "Generate" to create UUIDs.

What is a UUID?

A Universally Unique Identifier (UUID) is a 128-bit number used to uniquely identify information in computer systems. When generated according to standard methods, UUIDs are for practical purposes unique globally. This means you can create a UUID on your computer, and it's highly unlikely to be the same as a UUID generated by someone else, anywhere else in the world, at any time.

UUID Versions Explained

  • UUID v1 (Time-based): Generates a UUID based on the current timestamp and the MAC address of the computer. While generally unique, it can expose the MAC address and generation time.
  • UUID v4 (Random): Generates a UUID using purely random numbers. This is the most commonly used version due to its simplicity and strong privacy characteristics, as it contains no identifiable information.

Common Use Cases

  • Database primary keys to ensure unique records across distributed systems.
  • Identifiers for files, objects, or sessions in software applications.
  • Generating unique names for temporary files or directories.
  • Tracking events or transactions in logging systems.