What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. The term GUID (Globally Unique Identifier) is also used, typically in Microsoft systems.
How unique is it?
The probability of generating duplicate UUIDs is close to zero. To put it in perspective, you would have to generate 1 billion UUIDs every second for the next 100 years to have a 50% chance of just one collision.
Version 4 UUIDs
This tool generates Version 4 UUIDs, which are randomly generated. This is the most common version used in modern applications for primary keys, session IDs, and transaction tokens.