UUID (v4) Generator

What is a UUID?

A UUID (Universally Unique Identifier), sometimes called a GUID (Globally Unique Identifier), is a 128-bit number used to identify information in computer systems. A Version 4 (v4) UUID is the most common type and is generated using random numbers.

The "random" part is key. A v4 UUID is generated from a sequence of random numbers so large that the probability of two identical UUIDs being generated is practically zero. This makes them perfect for creating unique database keys, session IDs, and anything else that needs to be one-of-a-kind without coordinating with a central server.

This tool uses your browser's built-in crypto.randomUUID() function, which is a cryptographically secure method for generating v4 UUIDs.