A Version 4 UUID is a universally unique identifier that is generated using random numbers. The UUIDs from this website were generated using a cryptographically-strong random number generator.

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.

UUIDs generated from this site are RFC 4122 compliant. The UUIDs generated by this site are provided "AS IS", without warranty of any kind. You are responsible for using the UUIDs and assume any risk inherent to using them. Do not use the UUIDs generated by this site if you do not agree to these terms. UUIDs from cached versions of this site should not be used.