Internationalized Domain Name (IDN) Decoder

Decode ASCII Punycode domain names (starting with xn--) back into human-readable Unicode internationalized domains.

How It Works & Processing Standards

Decode ASCII Punycode domain names (starting with xn--) back into human-readable Unicode internationalized domains.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

Internationalized Domain Name (IDN) Decoder is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Internationalized Domain Name (IDN) Decoder

  1. 1
    Enter Punycode DomainPaste the ASCII domain starting with xn--.
  2. 2
    View Unicode DomainRead and copy the restored multilingual domain name.

Common Use Cases

  • Inspecting suspicious phishing URLs (homograph attack detection), web browsing safety, and DNS troubleshooting
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