[tomtomtom777]

Nice except that it is an absolute no go to generate these on the server.

Why not port to JS and generate it on the client? Should be trivial.

Yould should not encourage people to trust you.

[riskable]

Yeah! Only a, "distasteful mail pouch of ratty cuckoo dejecta" would use a 3rd party service to generate passphrases!