When registering a domain
at Knipp, you always enter the original name including
all umlauts and other special characters. That is “grün.info”, for example,
or the japanese character string
“ジェーピーニック.com”.
That means you don't have to worry about the transmutation into Punycode.
In case that you are interested in what the browser makes of the original name
anyway, you can use the form on this page.
Our Punycode conversion tool has been complimented on in the specialized
press, e.g. in the german computer magazine c't (c't 25/03, page 61).
The Punycode conversion tool
You can use domain names as input and convert them into the appropriate Punycode
output, or you can choose the reverse direction from the RFC 3492-accordant
coding back to the original characters. Just enter the known character
string in the dedicated field. The unknown character string will be determined
after clicking the respective conversion button.
By the way: You can copy the Punycode character string that has been computed
from a domain name to the address line of your browser. This way, you can view
the respective page even with browsers that otherwise do not support
Internationalized Domain Names.