IDN Decode a String
Decode an ASCII (xn--) domain name back to Unicode. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use IDN Decode a String
- 1. Paste the ASCII domain. Enter the punycode-encoded domain name into the input pane, the xn-- prefixed form like xn--mnchen-3ya.de that a browser address bar or DNS record shows.
- 2. Read how decoding works. There are no settings; the tool applies RFC 3492 punycode decoding to convert the ASCII-compatible xn-- label back into its original Unicode characters.
- 3. Copy the Unicode domain. Copy the human-readable domain, such as münchen.de, from the output pane into your documentation, spreadsheet or bug report.
When to use IDN Decode a String
IDN Decode a String converts an internationalized domain name from its ASCII-safe xn-- punycode form back into readable Unicode. It's for whenever a system shows you the encoded form of a domain and you need to know what it actually spells.
- Reading a suspicious domain from a phishing email. A security review flags a domain like xn--pple-43d.com in a phishing email header. Decoding it reveals the actual Unicode characters, which often expose a homoglyph attack mimicking a real brand.
- Interpreting a DNS zone file entry. A DNS zone file lists a punycode label for an internationalized domain you manage. Decoding it confirms the label matches the intended non-English domain name before you make changes.
- Debugging a browser address bar mismatch. A user reports the address bar shows an odd xn-- string instead of the expected domain. Decoding it tells you whether the domain genuinely uses non-ASCII characters or something is wrong.
- Documenting an internationalized domain for a client. A client's domain uses accented characters and their registrar records only show the punycode form. Decoding it once gives you the correct spelling for a proposal or contract.
Examples
Decode
Input
xn--mnchen-3ya.de
Output
münchen.de
About the IDN Decode a String tool
IDN Decode a String is a free online tool that works entirely inside your web browser. Decode an ASCII (xn--) domain name back to Unicode. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 159 String utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
There is nothing to configure. Provide the input and the result appears on its own. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is IDN Decode a String free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.