Punycode Converter
Unicode domain ⇄ Punycode.
🌐Punycode Converter
All processing happens locallyWhat this tool does
Punycode Converter is a Punycode Converter that computes locally and shows the result instantly., everything runs inside your browser, so neither the key nor the plaintext ever leaves your device.
Copy the result directly. Keys are never persisted anywhere, so save them yourself.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
DNS only accepts ASCII; an internationalised domain must be encoded as xn-- Punycode before registration or resolution. Browsers display the original form.
It is the label’s Unicode code points encoded with the RFC 3492 Bootstring algorithm. It is not encryption and converts back losslessly.
Yes. Each label is converted separately, so Chinese subdomains and Chinese TLDs both work.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.