# Punycode Encoder

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

> Canonical page: https://elysiatools.com/en/tools/punycode-encoder

- **Category:** Format Conversion

- **Keywords:** punycode, encode, idn, domain, international, ascii, url

## Overview

The Punycode Encoder allows you to convert internationalized domain names (IDNs) containing non-ASCII characters into their compatible ASCII-based Punycode format. This ensures your domain names are correctly recognized by DNS systems and web browsers worldwide.

## Inputs

- **Domain Name** (text): Enter international domain (e.g., münich.com, 中国.cn)

## When to use

- When you need to register or configure a domain name that includes non-Latin characters.
- When troubleshooting DNS issues related to internationalized domain names.
- When you need to generate the ASCII-compatible version of a domain for server configuration files.

## How it works

- Enter your internationalized domain name into the input field.
- The tool processes the Unicode characters using the Punycode algorithm.
- The system outputs the corresponding ASCII-compatible string, typically prefixed with 'xn--'.

## Use cases

- Preparing international domain names for DNS zone file entries.
- Ensuring compatibility for web server virtual host configurations.
- Verifying how a browser will interpret an internationalized domain name.

## Frequently asked questions

### What is Punycode?

Punycode is a representation of Unicode characters using only the limited ASCII character set, specifically designed for the Domain Name System.

### Why do I need to encode my domain?

DNS infrastructure only supports ASCII characters. Encoding your domain ensures it is readable by all internet protocols.

### Does this tool support all languages?

Yes, it supports any international character set that is valid within the IDN standard.

### Is the output case-sensitive?

Domain names are generally case-insensitive, and the Punycode output will be in lowercase ASCII.

### Can I decode Punycode back to text?

This specific tool is designed for encoding; however, the resulting 'xn--' string can be decoded by standard IDN-compliant browsers.

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- [Punycode Decoder](https://elysiatools.com/en/tools/punycode-decoder): Decode Punycode (ASCII) domain names to international domain names (IDN)
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## Samples

- [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion
- [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion
- [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion
- [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion

## Related content

- [Unicode, Emoji, and Invisible Character Debugging](https://elysiatools.com/en/hubs/unicode-emoji-debugging): Find hidden or confusable Unicode characters, inspect emoji and domain representations, normalize only when justified, and verify the cleaned copy before it reaches search, URLs, forms, or parsers.
- [Email MIME Delivery Prep and Handoff](https://elysiatools.com/en/hubs/email-mime-delivery-workflows): Validate recipients, inspect domain and DNS signals, encode MIME-safe content, add tracking parameters, and package a pre-send handoff artifact.