# Online UUID v4 Generator
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 widely used, typically in Microsoft systems. This tool generates Version 4 UUIDs, which are based on random numbers.
UUIDs are essential in software development for generating unique keys for database records, session IDs, transaction markers, and more. Because the probability of collision is astronomically low, they can be generated independently on different systems without a central coordination authority.
This generator runs entirely in your browser (client-side), ensuring that your generated IDs are private and never sent to any server. You can customize the output format by toggling hyphens or converting specific characters to uppercase to suit your project requirements.