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Punycode Converter

Convert between Punycode (ASCII-safe encoding) and Unicode domain names. Essential for working with internationalized domain names (IDN).

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How to use Punycode Converter

  1. Enter a Unicode domain name or Punycode string.
  2. Click Convert to see the result.
  3. The tool auto-detects the input format.
  4. Copy the converted result for your use.

What is Punycode Converter?

Punycode is an encoding scheme used to represent Unicode characters in the ASCII character set, primarily for internationalized domain names (IDN). Domain names like 'münchen.de' become 'xn--mnchen-3ya.de' in Punycode.

This tool converts in both directions: Unicode to Punycode and Punycode to Unicode. It handles the 'xn--' prefix automatically.

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FAQ

What is Punycode used for?
Punycode is used to encode Unicode characters in domain names so they can be used with the existing DNS system, which only supports ASCII characters.
What does 'xn--' mean?
The 'xn--' prefix is a marker that indicates a domain label is Punycode-encoded. DNS servers use this to identify and decode internationalized domain names.

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Author

NK
Prof. Noah Klein"The Privacy Guardian"

Cybersecurity Researcher & Privacy Advocate

Professor Klein holds a PhD in Information Security and has testified before EU parliamentary committees on data privacy legislation. He builds encryption tools for journalists, audits web applications for security flaws, and believes that privacy is not a feature but a fundamental right. His research has been cited in Wired, Nature, and The Guardian, and he advises nonprofits on responsible data stewardship.

📖 Punycode Converter on Wikipedia·Encoding on Wikipedia·Punycode Converter on Britannica

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