DevToolsmith

Punycode Converter

Converts domain labels between Unicode and ASCII Punycode without making a network request.

Runs 100% in your browser — nothing is uploaded

Input
Tip: drop a file here5 chars · 13 bytes · 1 line
Result
0 chars · 0 bytes · 0 lines

Up to 200,000 input characters and 2 million output characters. Processing stays on this device.

Use Punycode Converter

Converts domain labels between Unicode and ASCII Punycode without making a network request. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

Converts domain labels between Unicode and ASCII Punycode without making a network request. Enter a domain, not a full URL or email address. ASCII label and DNS length checks are applied. This is an encoding utility, not complete IDNA registration or confusable-domain validation.

Example input

例子.测试

Expected behavior for the example

xn--fsqu00a.xn--0zwm56d; select decode to convert this ASCII domain back to 例子.测试.

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does Punycode Converter handle my input?

Converts domain labels between Unicode and ASCII Punycode without making a network request. Enter a domain, not a full URL or email address. ASCII label and DNS length checks are applied. This is an encoding utility, not complete IDNA registration or confusable-domain validation.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.