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Punycode Converter

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

Mode

Unicode to Punycode

Enter domain name or text with Unicode characters
Quick Examples:

About Punycode and IDN

Punycode is a way to represent Unicode characters using only ASCII characters, enabling internationalized domain names (IDN). It's defined in RFC 3492 and used by DNS to support non-English domain names.

How It Works

  • Prefix: IDN domains use "xn--" prefix
  • ASCII-Compatible: Works with existing DNS infrastructure
  • Reversible: Can convert back to Unicode
  • Per-Label: Each domain label encoded separately

Common Examples

  • German: münchen.de → xn--mnchen-3ya.de
  • Japanese: 日本.jp → xn--wgv71a.jp
  • Russian: москва.рф → xn--80adxhks.xn--p1ai
  • Arabic: مصر → xn--wgbh1c
Security Note: Be cautious of homograph attacks where similar-looking characters from different scripts can create fake domains (e.g., "а" Cyrillic vs "a" Latin). Always verify IDN domains carefully.
Browser Support: Modern browsers automatically convert IDN domains to Punycode when making DNS queries, and display the Unicode version in the address bar (with security restrictions).

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