IDN ↔ Punycode Converter | International Domain Name Tool

Convert internationalized domains (IDN) with multilingual characters and emojis into standard Punycode, or restore them back to their original Unicode domains.

  • Bidirectional conversion (IDN ↔ Punycode)
  • Batch processing for multiple domains
  • Instant conversion results
  • Optimized for developers, domain managers, and global businesses

Ensure reliable DNS configuration, web development, and domain management with accurate Punycode conversion.

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Have questions?
Check the FAQ.

Punycode is an international standard algorithm that converts internationalized domain names (IDN) containing multilingual characters or emojis into ASCII strings made up only of letters and numbers.
It is defined in the RFC3492 standard and ensures compatibility across all web browsers and DNS servers.

Domains converted to Punycode always begin with the xn-- prefix.
Example: 例.com → xn--fsq.com

This allows domains in different languages to be registered, searched, and accessed worldwide without issues, making it an essential technology for global businesses and multilingual websites.

Yes. Punycode is an international standard that can convert not only multilingual characters but also emojis (😊, 🚀, 🍀, etc.) into an ASCII-based string.
For example, 😊.com is converted into xn--74h.com in Punycode, making it compatible with all browsers and DNS systems.

However, some domain registrars or hosting providers may not officially support emoji domains.
It’s recommended to check support before registration, but since conversion itself works without issues, they can still be used for global websites.

On web servers such as Apache or Nginx, you cannot directly enter Unicode domains containing characters like Japanese, Chinese, or emojis.
You must configure the domain in its Punycode format to ensure proper operation.

For example, 例.com must be registered as xn--fsq.com in the server configuration.
Access logs and Host header values will also always be recorded in Punycode format.

Therefore, when using internationalized domains, always base your server configuration, SSL certificate registration, and application code on the Punycode version.
This ensures reliable website operation across all browsers and DNS environments.