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Punycode Converter

Convert internationalized domain names to Punycode (xn--) and back, including URLs and email addresses.

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How to use the Punycode Converter

  1. 1

    Choose a direction.

  2. 2

    Paste domains, URLs or email addresses, one per line.

  3. 3

    Copy the converted list.

Frequently asked questions

What is Punycode?

An encoding (RFC 3492) that writes Unicode domain names with only letters, digits and hyphens, so they work in DNS. bücher.de becomes xn--bcher-kva.de.

Are URLs and emails supported?

Yes. Only the domain part is converted; the scheme, user name, port and path are left as they are.