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Fullwidth / Halfwidth Text

Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms.

Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms.

Options

Up to 100,000 UTF-16 code units; input and results stay in page memory. The original remains available. No automatic clipboard reading or saving. Only U+FF01–FF5E and ASCII U+0021–007E plus ideographic/ASCII spaces. Katakana, Hangul, emoji and broader Unicode normalization are not changed.

How to use

Fullwidth / Halfwidth Text

Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms.

Step by step

  1. Choose a supported input or load the example, then review the original.
  2. Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms. Start with the displayed settings, change only the options needed for your output and compare the result with your source.
  3. Run the task, review the actual result and copy or download a checked copy.

Choosing the settings

OptionWhat changes
OptionsConvert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms. Start with the displayed settings, change only the options needed for your output and compare the result with your source.
LimitsUp to 100,000 UTF-16 code units; input and results stay in page memory. The original remains available. No automatic clipboard reading or saving. Only U+FF01–FF5E and ASCII U+0021–007E plus ideographic/ASCII spaces. Katakana, Hangul, emoji and broader Unicode normalization are not changed.

Example and expected result

ＡＢＣ１２３！ converts to ABC123!, while 中文 stays 中文. Converting back restores the supported ASCII-width forms.

If it is not working

  • No text to convert. Paste text or load the example.

Formats and limits

Up to 100,000 UTF-16 code units; input and results stay in page memory. The original remains available. No automatic clipboard reading or saving. Only U+FF01–FF5E and ASCII U+0021–007E plus ideographic/ASCII spaces. Katakana, Hangul, emoji and broader Unicode normalization are not changed.

FAQ

What does this tool do?

Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms.

Which setting should I choose?

Convert ASCII letters, digits, punctuation and spaces between fullwidth and halfwidth forms. Start with the displayed settings, change only the options needed for your output and compare the result with your source.

What are the limits?

Up to 100,000 UTF-16 code units; input and results stay in page memory. The original remains available. No automatic clipboard reading or saving. Only U+FF01–FF5E and ASCII U+0021–007E plus ideographic/ASCII spaces. Katakana, Hangul, emoji and broader Unicode normalization are not changed.

Why did processing fail?

No text to convert. Paste text or load the example.

Is my input uploaded or saved?

No. Processing runs on your device. Inputs and results stay in this page’s memory until you clear it or leave. They are not uploaded, logged or stored by ToolRobin. Copying places the result on your device’s clipboard.

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