Online tools for converting punycode

Verisign's IDN Conversion Tool: http://mct.verisign-grs.com/convert Servlet?input=Mot%C3%B6rhead

All About Charsets: http://www.charset.org/punycode.php

Prior to the 2014 expansion of the TLD space, IDNs existed within many of the legacy TLDs. In other words, the label to the left of the dot could support IDN strings while the domain suffix, the TLDs themselves, were all ASCII.

With the advent of the new TLDs, IDNs are now supported to the right of the dot, such as Hong Kong's  Again, at the level of DNS lookups, you can't simply dig this suffix's internationalized label:

Rather, the label is converted to punycode (xn--j6w193g):

$ host -t ns xn--j6w193g
xn--j6w193g name server C.HKIRC.NET.HK.
xn--j6w193g name server Y.HKIRC.NET.HK.
xn--j6w193g name server V.HKIRC.NET.HK.
xn--j6w193g name server U.HKIRC.NET.HK.
xn--j6w193g name server B.HKIRC.NET.HK.
xn--j6w193g name server W.HKIRC.NET.HK.
xn--j6w193g name server Z.HKIRC.NET.HK.
xn--j6w193g name server D.HKIRC.NET.HK.
xn--j6w193g name server X.HKIRC.NET.HK.