Full/Half-width Converter
Convert full-width letters, digits, punctuation and spaces to half-width or back, choosing which kinds of characters to change.
0 characters · 1 line
Chinese punctuation such as 「」『』、。《》 has no half-width form and is left as it is.
How to use
- Paste text into “Original text”, or click “Example” to try it.
- Choose “To half-width” or “To full-width”.
- Pick which characters to convert: letters and digits, punctuation and symbols, spaces. The numbers in brackets show how many can be converted.
- The result updates instantly with a count of converted characters. Click “Copy” or “Download” to grab it.
FAQ
What are full-width and half-width characters?
Half-width characters are the ordinary Latin letters, digits and symbols (A, 1, !). Full-width characters (Ａ, １, ！) are as wide as a Chinese character and are common in Chinese, Japanese and Korean text. They are different characters to a computer, so they break searches, usernames and form validation.
Does it change Chinese punctuation like 「」 or 。?
No. Punctuation such as 「」『』、。《》〈〉 and …… has no half-width counterpart and is never touched. Only characters with a full-width/half-width pair in Unicode are converted, such as ， ↔ , and ！ ↔ !.
How do I fix only full-width letters and digits but keep Chinese punctuation?
Choose “To half-width”, keep “Letters and digits” checked and uncheck “Punctuation and symbols” and “Spaces”. “ＡＢＣ１２３，你好！” then becomes “ABC123，你好！”.
What is a full-width space?
The ideographic space (U+3000) is as wide as a Chinese character. It often sneaks in when copying from Word or web pages, looks like two spaces and survives ordinary “trim” functions. Check “Spaces” to turn it into a normal space.
Which characters are supported?
All 94 visible ASCII characters (! to ~), the space, and the seven symbols with full-width forms: ¢ £ ¬ ¯ ¦ ¥ ₩. Half-width Japanese katakana is not converted.
Is my text uploaded?
No. Everything is converted in your browser and never leaves your device.
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