Punycode Converter (IDN)

Convert domain names with non-English characters to Punycode (xn--) and back. Paste a domain or a full URL, one per line.

Domains or URLs (one per line)

Result

Punycode and IDN Converter

Domain names can contain non-English letters, for example münchen.de. DNS only understands ASCII, so these names are stored in Punycode, such as xn--mnchen-3ya.de.

This tool converts in both directions. You can paste bare domains or full URLs. Only the domain part is converted, and the rest of the URL is left unchanged.

Key features

Unicode to Punycode (xn--)
Punycode to Unicode
Accepts domains or full URLs
One per line for bulk conversion

Example

münchen.de  =  xn--mnchen-3ya.de

How to use

Paste your domains or URLs.
Click To Punycode or To Unicode.
Copy the result.

Use cases

Setting up DNS or SSL for an internationalized domain
Reading xn-- domains in logs and reports
Checking suspicious look-alike domains

Frequently Asked Questions (FAQ)

What is Punycode?+

An encoding that represents Unicode characters using only letters, digits and hyphens, so international domain names work with DNS.

What does xn-- mean?+

It marks a domain label that is Punycode encoded.

Why does the result differ from the browser's address bar?+

Browsers may show the Unicode form for some domains and Punycode for others to guard against look-alike spoofing.

Is my input uploaded?+

No. The conversion runs in your browser.