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Punycode Converter

Convert an internationalised domain name between Unicode and its Punycode (IDNA/ASCII) form. Handles every label in the domain, so you can paste a full host name.

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Frequently asked questions

      

        
What is Punycode used for?

        
DNS only understands ASCII. Punycode (RFC 3492) encodes Unicode domain labels into ASCII starting with "xn--", which is how internationalised domain names actually resolve.

        
Can I convert a whole domain at once?

        
Yes. Every label is converted independently, so "münchen.de" becomes "xn--mnchen-3ya.de" in one step.

        
Is my input uploaded?

        
No. The conversion is implemented locally and runs entirely in your browser.