Your files stay on your device

# Punycode and IDN converter

Unicode hostnames to xn-- labels and back, with homograph warnings.
Unicode → ASCIIASCII → UnicodeClearHostname

RFC 3492 punycode per label; non-ASCII labels get xn-- prefixes, ASCII labels pass through.
Paste, drop, or type to begin. Everything stays on this device.

## More encoding tools

- [URL encoder](/encoding/url-encoder)
- [HTML entities](/encoding/html-entities)
[All encoding tools](/encoding)

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Canonical HTML: https://nutter.tools/encoding/punycode/
Markdown version: https://nutter.tools/encoding/punycode/index.md
Plain-text version: https://nutter.tools/encoding/punycode/index.txt
Agent index: https://nutter.tools/llms.txt