erlang-idna

A pure Erlang IDNA implementation.

Usage

1> Domain = unicode:characters_to_list("www.詹姆斯.com").
...
2> idna:to_ascii(Domain).
...

RFC3492 (Punycode)

addressable (Ruby URI implementation)

punycode4r (Ruby punycode implementation)

UAX #15 (Unicode Normalization Forms)