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Punycode Converter

Convert internationalised domain names to Punycode and decode xn-- domains back.

To convert a domain to Punycode, enter an internationalised domain name and the ASCII-compatible xn-- form appears. DNS only supports ASCII, so every non-Latin domain is stored in this encoded form while browsers display the readable Unicode version.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why do some domains start with xn--?

That prefix marks a Punycode-encoded label. DNS can only carry ASCII, so a domain like münchen.de is transmitted as xn--mnchen-3ya.de and rendered back to Unicode by the browser.

How to use the punycode converter

  1. 1Enter or paste your domain or punycode.
  2. 2Choose the direction.
  3. 3The result appears immediately — copy or download it.

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Put the working punycode converter on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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