./prontouso.com

SEO & WEB TOOLS

Punycode / IDN Converter

Convert a domain name between its Unicode form and its ASCII-only Punycode (xn--) form, label by label.

Tool statusRuns in your browser
Preview

Result

Works label by label, so only the parts of a domain that need encoding are changed.

How it works

  1. Enter your input

    Fill in the values, paste your text, or upload the file this tool works with.

  2. See results instantly

    Most tools update live as you type; a few use a single button. Either way, the result appears right on this page.

  3. Use your results

    Copy, download, or share what the tool produces — you're always in control of the output.

Privacy and processing — Runs locally in your browser. This tool does not upload your input.

What is Punycode / IDN Converter?

Convert a domain name between its Unicode form and its ASCII-only Punycode (xn--) form, label by label.

UNDERSTAND THE TOOL

How Punycode and IDN domains work

How it works

Internationalized domain names store non-ASCII characters using Punycode, prefixed with xn--, since DNS itself only supports ASCII. Each label (the part between dots) is converted independently.

Common uses

  • Check what a Unicode domain actually resolves to at the DNS level.
  • Decode an unfamiliar xn-- domain you've encountered to see what it actually says.

Good to know

  • Encoding is idempotent for already-ASCII labels — a plain label like "www" is never modified.
  • A decoded label that fails to parse is left exactly as typed, rather than showing an error, since a domain may still be mid-edit.

Example conversion

Unicode to ASCII

A domain such as münchen.example is encoded label by label, while the ASCII label example stays unchanged.

münchen.example -> xn--mnchen-3ya.example

Domain conversion notes

The converter works label by label in your browser and does not perform DNS lookups, availability checks, or navigation to the domain you type.

Frequently Asked Questions

Why do only some labels change?

Only labels containing non-ASCII characters need Punycode encoding — a label that's already plain ASCII, like "www", is left exactly as it is.

Is this specific to domain names?

Punycode itself is a general text encoding, but this tool applies it the way browsers and DNS do: to one domain label at a time.

Can Punycode represent any Unicode domain name?

Yes — any sequence of Unicode code points can be encoded, though the resulting domain must still follow DNS length limits per label.

Does this check whether a domain exists?

No. It only converts the text form of each domain label. It does not query DNS, WHOIS, or registrar availability.

Related Tools