UUID / GUID Generator
What is UUID?
UUID (Universally Unique Identifier) is a standardized 128-bit identifier used to uniquely identify information in distributed systems. Its core value is generating globally unique IDs without centralized coordination. The theoretical total number of UUIDs is approximately 3.4×10^38 — even generating 1 billion per second, it would take 10 billion years to exhaust them. UUID is also called GUID, which is Microsoft's implementation of the standard.
UUID Use Cases
UUID is widely used in software development: as database primary keys (avoiding ID conflicts in distributed systems), resource identifiers in APIs, unique filenames, session IDs, order numbers, and more. UUID v4 is the most common version, based entirely on random number generation. Our online generator supports batch generation (1-100), case switching, and with/without hyphen formats.