Full-width ↔ Half-width Converter

Convert full-width and half-width text for Japanese and mixed-language input. Choose spaces, letters, numbers, symbols, and kana with one-click copy.

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Text to convert

Conversion happens locally in your browser for fast, private processing.

Conversion direction

Full-width → Half-widthHalf-width → Full-width

Characters to convert

Select only the character types you want to normalize.

Converted result

Copy the result into forms, CSVs, or code after conversion.

Normalize full-width (zenkaku) and half-width (hankaku) characters in seconds. This converter helps you standardize spacing, English letters, numbers, symbols, and katakana so forms, CSV files, and databases stay consistent. It is ideal for Japanese, Chinese, and multilingual content workflows that mix full-width and half-width text.

Select the conversion direction, pick only the character types you need, and convert instantly. Everything runs locally in your browser, so your text never leaves your device.

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