Punycode Encoder/Decoder

Punycode is an encoding syntax that converts Unicode characters into ASCII, used specifically for internationalized domain names (IDN). For example, münchen.de becomes xn--mnchen-3ya.de.

The Domain Name System (DNS) only supports ASCII characters. Punycode allows non-ASCII characters (like Chinese, Arabic, Cyrillic) to be used in domain names by encoding them as ASCII.

An Internationalized Domain Name (IDN) is a domain name that contains characters from non-ASCII scripts. IDNs use Punycode encoding to be compatible with the DNS system.

Yes, Punycode encoding is fully reversible. You can decode any Punycode string back to its original Unicode representation without any data loss.

Simply paste or type your domain name or Unicode text into the input field. The tool instantly converts it to Punycode format (for encoding) or back to Unicode (for decoding). No registration or installation required.

The xn-- prefix is a special marker that indicates a domain name has been encoded using Punycode. It tells the DNS system that the following characters are in Punycode format and need to be decoded.

Yes, you can encode the domain part of email addresses. For example, user@münchen.de becomes [email protected]. The local part (before @) should remain in ASCII format.

Yes, this Punycode encoder and decoder is completely free. No registration, no usage limits, and no hidden fees. You can convert as many domain names as you need.

RFC 3492 is the technical specification that defines the Punycode encoding algorithm. It was published by the IETF in 2003 as part of the IDNA (Internationalized Domain Names in Applications) standard.

Yes, Punycode can encode any Unicode character, including Chinese, Japanese, Korean, Arabic, Cyrillic, Hebrew, Thai, and many other scripts. The encoding is lossless and reversible.