Punycode / IDN Converter

What is a Punycode / IDN Converter?

Convert Internationalized Domain Names (IDN) containing non-ASCII characters (like `münchen.de` or `café.com`) into ASCII Punycode strings (`xn--...`), and decode Punycode back to Unicode domain names.

Why Use This Tool?

Domain Registration: Register internationalized domain names (IDNs) with DNS registrars that require ASCII Punycode format.
DNS Server Config: Configure DNS zone files for domains containing non-English characters.
Phishing & Security Inspection: Detect homograph attacks where visually similar Unicode characters spoof legitimate domain names.

How to Use

Paste a Unicode domain (e.g., `münchen.de`) or Punycode domain (`xn--mnchen-3ya.de`).
The tool detects the format and converts it automatically in real time.
Copy the converted domain string.

Real Working Example

Input:

münchen.de

Output Result:

Punycode: xn--mnchen-3ya.de

Important Technical Details & Features

RFC 3492 Punycode Spec: Follows official RFC 3492 Punycode encoding algorithm for IDNA domains.
Full International Alphabet Support: Supports Cyrillic, Greek, Arabic, Chinese, Devanagari, and accented Latin domains.
Client-Side Processing: Converts domains locally in browser memory.

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Frequently Asked Questions

What is Punycode?

Punycode is a syntax used to translate Unicode domain names into an ASCII-Compatible Encoding (ACE) string starting with xn--.

Why do Internationalized Domain Names need Punycode?

The global Domain Name System (DNS) historically supports only ASCII letters, digits, and hyphens.

Does it support email addresses?

Yes, international email domain portions are converted accurately.

Is it free?

Yes, 100% free.

What is the main function of Punycode / IDN Converter?

Convert Internationalized Domain Names (IDN) between Unicode (e.g. münchen.de) and ASCII Punycode (xn--mnchen-3ya.de). This converter transforms punycode / idn data formats locally without server uploads.