What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems. The beauty of a UUID is that it can be generated completely offline without a central authority, and the chances of a collision (generating the same ID twice) are practically zero.
Why use Version 4?
Version 4 UUIDs are generated using pseudo-random numbers. Unlike Version 1, which uses your computer's MAC address and the current time, Version 4 provides complete privacy and is the standard for most modern web applications and databases.
Is my data private?
Yes. This tool uses your browser's native cryptography API. The UUID is generated locally on your machine and is never sent to or stored on our servers.