Full Half Width Converter
Convert full-width and half-width ASCII characters locally.
Output
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Common tasks
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Features
- Convert fullwidth (CJK) characters to halfwidth (ASCII)
- Convert halfwidth ASCII to fullwidth equivalents
- Optional space conversion
- Local-only processing — no upload
Frequently asked questions
- What are fullwidth and halfwidth characters?
- Fullwidth characters are double-width forms used in CJK typography (e.g. ‘Ａ’, ‘，’); halfwidth are standard ASCII width (‘A’, ‘,’).
- Does it work on Chinese punctuation?
- Yes. The tool converts fullwidth punctuation like ‘，。！’ to ASCII ‘,.!’ and back.
- Is the conversion lossless?
- For supported characters, yes. Round-tripping a string through full → half → full preserves the original characters.