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Punycode Decoder

Decode Punycode (ASCII) domain names to international domain names (IDN)

Key Facts

Category
Format Conversion
Input Types
text
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The Punycode Decoder is a specialized utility designed to instantly convert Punycode-encoded ASCII strings into their readable Internationalized Domain Name (IDN) format, allowing you to see the original Unicode characters used in global domain registrations.

When to Use

  • •When you encounter an 'xn--' domain string and need to identify the actual website name in its native language.
  • •When verifying the authenticity of internationalized URLs to ensure they match the intended brand or entity.
  • •When debugging DNS records or configuration files that store domain names in their encoded ASCII format.

How It Works

  • •Paste the Punycode string (starting with 'xn--') into the input field.
  • •The tool automatically processes the ASCII sequence using the standard Punycode algorithm.
  • •The decoded Unicode domain name is displayed immediately for your review.

Use Cases

Translating international marketing URLs for regional analysis.
Auditing domain portfolios to ensure correct Unicode representation.
Resolving technical issues with IDN-based email or web server configurations.

Examples

1. Decoding a German Domain

Web Developer
Background
A developer is reviewing server logs and sees a request for 'xn--mnich-kva.com'.
Problem
The developer needs to know the actual domain name to verify the site's identity.
How to Use
Enter 'xn--mnich-kva.com' into the decoder.
Outcome
The tool outputs 'münich.com', revealing the correct spelling with the umlaut.

2. Verifying a Chinese Domain

IT Administrator
Background
An admin is configuring a firewall and needs to whitelist 'xn--fiqs8s.cn'.
Problem
The admin must confirm the domain name matches the company's official Chinese registration.
How to Use
Input 'xn--fiqs8s.cn' into the tool.
Outcome
The tool returns '中国.cn', confirming the domain is the official registration for 'China.cn'.

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FAQ

What is Punycode?

Punycode is an encoding scheme used to represent Unicode characters in the limited ASCII character set required for the Domain Name System (DNS).

Why do some domains start with xn--?

The 'xn--' prefix indicates that the domain contains non-ASCII characters, such as accented letters or non-Latin scripts, which have been encoded for DNS compatibility.

Is this tool safe to use for sensitive domains?

Yes, the decoding process happens locally or via a secure request without storing your input data.

Can I decode entire URLs or just domain names?

This tool is optimized for domain names; please extract the domain portion from your URL before decoding.

Does this tool support all international scripts?

Yes, it supports all scripts compatible with the IDNA standard, including Chinese, Arabic, Cyrillic, and accented European characters.

API Documentation

Request Endpoint

POST /en/api/tools/punycode-decoder

Request Parameters

Parameter Name Type Required Description
domain text Yes -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-punycode-decoder": {
      "name": "punycode-decoder",
      "description": "Decode Punycode (ASCII) domain names to international domain names (IDN)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=punycode-decoder",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]