Width case converter
Convert between half-width and full-width characters with strict mode validation.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Text
Converted result
Converted by the selected mode.
Enter text to convert
What this tool does
- Convert width by mode.
- Process mixed-width text.
- Validate mode options.
Example
Input
Ｈｉ！
Output
Hi!
mode is to-half or to-full, defaulting to to-half.
Frequently asked questions
What is the default mode?
to-half.
Are Chinese characters processed?
No.
What happens with an invalid mode?
invalid-options is returned.
Keywords：半角全角width casefull-widthhalf-width