Is my input uploaded?

No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.

Can I use this in an application?

Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.

Should I verify the result?

Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.

Developer Tools

Punycode Converter

Encode an internationalized hostname to ASCII Punycode or decode xn-- labels to Unicode.

Free foreverRuns in your browserNo sign-up

Domain nameMode

Result

Enter your values and select convert domain.

About the Punycode Converter

Punycode Converter is a focused browser-based utility. Encode an internationalized hostname to ASCII Punycode or decode xn-- labels to Unicode.

The calculation runs locally in your browser, so the supplied value is not uploaded to ToolsOnDuty. The same capability is also available through the authenticated developer API.

Key features

Fast local processing with explicit validation
Copy-ready structured result
No account, upload or paid data provider required

How to use

1Enter a hostname without a path or protocol.
2Choose any available conversion or formatting options.
3Run the tool and review the encoded or decoded hostname.

Examples

Punycode Converter example

Input: a hostname without a path or protocol

Output: the encoded or decoded hostname

Frequently asked questions

Is my input uploaded?: No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.
Can I use this in an application?: Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.
Should I verify the result?: Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.