Clean interface and user friendly Nice work done here and recommended as well. Just a point to note that it's a bit of work to select the numbers in the iP address section. It does not highlight unless you are very precisely touching the numbers. But this is just me as a user. Kind of inconvenience. But does what it's developed for. Recommended.
All changes are related to IPv6:
A random unique local address is generated using the algorithm described in RFC4193.
A link-local address is generated either from Modified EUI-64 address or randomly.
A generated global address returns the documentation prefix 2001:DB8::/32.
The Generate button creates address prefixes only, unless a MAC address is entered or the address is link-local.
The clear button clears the MAC address and resets the IPv6 address to 2001:DB8::/64.