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.

Why is Punycode needed?

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.

Is Punycode encoding reversible?

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

Punycode Encoder/Decoder

Encode internationalized domain names to Punycode and decode Punycode back to Unicode. Supports IDN conversion.

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