Punycode & IDN Converter

Convert internationalized domain names to and from Punycode ACE form (xn--) per RFC 3492/3490. Each label is encoded or decoded independently. Runs entirely in your browser.

Mode

Input (domain or label)

Output

Each dot-separated label is handled on its own. Labels with no non-ASCII characters are left untouched; labels starting with xn-- are decoded.