Punycode to Unicode Converter [2025]

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Convert Punycode encoded domain names and text to their Unicode representation. Essential for working with Internationalized Domain Names (IDN) and multilingual content.

✓ IDN Support✓ Auto Conversion✓ Error Handling

Punycode Input

Unicode Output

Key Features

  • Convert Punycode-encoded domain names to readable Unicode text
  • Support for Internationalized Domain Names (IDN)
  • Automatic conversion as you type
  • Process multiple lines of text simultaneously
  • Handle mixed content with both Punycode and regular text
  • Optional error handling for invalid Punycode
  • Copy results to clipboard with a single click
  • Example presets for quick testing

Common Use Cases

Domain Management

  • • IDN verification
  • • DNS configuration
  • • Domain registration
  • • SSL certificates

Development

  • • URL processing
  • • Email validation
  • • Internationalization
  • • Unicode handling

Content Management

  • • Multilingual content
  • • Character encoding
  • • Data validation
  • • Text processing

Frequently Asked Questions

What is Punycode?

Punycode is a representation of Unicode text that uses only ASCII characters. It's primarily used for Internationalized Domain Names (IDN) to encode domain names containing non-ASCII characters, such as Chinese, Arabic, or accented Latin characters.

What are IDNs?

Internationalized Domain Names (IDNs) are domain names that contain non-ASCII characters, such as "bücher.example" or "中国.com". These domains use Punycode encoding (e.g., "xn--bcher-kva.example") for compatibility with the existing DNS system.

When to use "Process as Domains"?

Enable "Process as Domains" when working with domain names that may contain both Punycode and regular text parts. This option ensures that only parts starting with "xn--" are decoded while leaving other parts unchanged.

Why use "Ignore Errors"?

The "Ignore Errors" option is useful when processing mixed content where some parts might contain invalid Punycode. Instead of failing the entire conversion, it will skip invalid parts and continue processing the rest of the content.

Technical Details

Punycode Format

Punycode-encoded domain labels always start with the prefix "xn--" followed by the encoded string. The encoding process uses a special base-36 encoding scheme that represents Unicode code points using only ASCII letters and digits.

Examples:

  • • "bücher" → "xn--bcher-kva"
  • • "中国" → "xn--fiqs8s"
  • • "münchen" → "xn--mnchen-3ya"

Conversion Process:

  1. Identify Punycode-encoded parts (starting with "xn--")
  2. Decode each part using the browser's IDN API
  3. Handle any conversion errors based on settings
  4. Combine results maintaining original structure

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