UUID Generator Version 4 UUID Version 1 UUID Nil/Empty UUID GUID Generator Sponsored by Auth0 Your Version 4 UUID: Refresh page to generate another. Generate a version 1 UUID. How Many? Download to a file A Version 1 UUID is a universally unique identifier that is generated using a timestamp and the MAC address of the computer on which it was generated. Generate a version 4 UUID. How Many? Download to a file A Version 4 UUID is a universally unique identifier that is generated using random numbers. The Version 4 UUIDs produced by this site were generated using a secure random number generator. The UUIDs generated by this site are provided AS IS without warranty of any kind, not even the warranty that the generated UUIDs are actually unique. You are responsible for using the UUIDs ...