# Punycode Converter

> Convert internationalised domain names to Punycode and decode xn-- domains back.

To convert a domain to Punycode, enter an internationalised domain name and the ASCII-compatible xn-- form appears. DNS only supports ASCII, so every non-Latin domain is stored in this encoded form while browsers display the readable Unicode version.

**URL:** https://convertto.tech/t/punycode-converter
**Category:** Encoders & Decoders (https://convertto.tech/c/encoding-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Enter or paste your domain or punycode.
2. Choose the direction.
3. The result appears immediately — copy or download it.

## FAQ

### Why do some domains start with xn--?

That prefix marks a Punycode-encoded label. DNS can only carry ASCII, so a domain like münchen.de is transmitted as xn--mnchen-3ya.de and rendered back to Unicode by the browser.

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