How to use Punycode Encoder

What it does

Convert internationalized Unicode domain names (IDN) into safe, standard ASCII-compatible Punycode. It runs entirely in your browser — your input never leaves your device.

Options

Every setting this tool exposes, straight from the code that validates it.

Worked example

Run these settings on the tool page:

• text: hello

You get:

hello

Troubleshooting

• Nothing happens / the output stays empty. text is required — the tool waits until you provide it.
• It is slow on very large input. Everything runs in your browser, so speed depends on your device. Very large inputs are best split up, or run through the API where the work happens on our servers.

Automating it

The same logic is available as a REST endpoint, so you can run it from a script, a CI job or your own app.

Bash
curl "https://api.toolsxpo.com/v1/punycode-encode" \
  -H "Authorization: Bearer $TOOLSXPO_KEY"

It costs 1 credit per successful call. See the full endpoint reference, or try it in the playground.

Related tools

• Curl to Fetch Converter
• Fetch to Curl Converter
• HTTP Headers Viewer
• Open Graph Inspector
• Punycode Decoder
• Query String Builder