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Punycode Converter

Turn a domain with accents, non-Latin letters or emoji into its ASCII xn-- form, or decode an xn-- domain to readable text.

Runs in your browser — nothing is uploaded.

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How to use it

  1. Pick “Unicode to Punycode” or “Punycode to Unicode”.
  2. Type or paste one domain per line, such as münchen.de or xn--mnchen-3ya.de.
  3. Each label (the parts between dots) is converted on its own; plain ASCII labels stay as they are.

Frequently asked questions

Is my text uploaded?

No. The conversion runs in your browser.

What is Punycode?

A way to write Unicode domain names with only the letters, digits and hyphens that DNS allows. A label becomes xn-- followed by the encoded text.

Does it change upper case or accents?

Going to ASCII it applies the standard IDNA mapping: upper case becomes lower case and text is normalised, so MÜNCHEN.de gives xn--mnchen-3ya.de.

Can I convert a full URL?

Paste only the domain. Paths, ports and queries are not part of a domain name.

Why do I get an error?

A label may not be empty or contain spaces or characters such as / ? # @ :, may not exceed 63 characters once encoded, and an xn-- label must be valid Punycode.

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