Your Privacy Protected – UUIDs are generated locally with your browser's secure random generator and never leave your device.
UUID – Version 4 (random)
UUID – Version 5 (name-based)
Version 5 UUIDs are deterministic: the same namespace and name always produce the same UUID. These formatting options apply only to Version 5.
About the UUID Generator
A UUID (also called a GUID) is a 128-bit identifier that is practically guaranteed to be unique, so it is widely used for database keys, API request IDs, file names and distributed systems. Version 4 UUIDs are fully random and are the most common choice.
This generator creates version 4 UUIDs in batches of up to 1000 using secure browser randomness, and can also create version 5 UUIDs, which are derived from a namespace plus a name using SHA-1, so the same input always yields the same identifier. Each section has its own formatting options (uppercase, braces, no hyphens).
Is anything stored? No. Every UUID is generated in your browser and nothing is uploaded.