Paste mixed-width text
The detector identifies convertible full-width and half-width characters, including hidden full-width spaces.
Full Width Characters Converter
Convert letters, numbers, symbols, spaces, and Japanese Katakana between full-width and half-width forms. Mixed-width characters are detected as you type.
Character width converter
Convert character types
Choose exactly what the conversion may change.
Input
Paste or type text
Mixed Width Detector
Enter text to inspect character widths
Full width
Half width
0 full-width
0 half-width
0 full-width spaces
0 half-width kana
Character inspection
Your text preview will appear here.
Output
Converted text
Change Report
No conversion yetSimple and precise
Convert only the character types you choose
The converter changes character width without applying broad Unicode compatibility normalization to unrelated characters.
Choose a direction
Convert to half width for form fields and product codes, or to full width for Japanese Katakana and formatted text.
Review every change
The change report shows the original character, converted character, category, and position before you copy the result.
Conversion examples
Common full-width and half-width conversions
Type
Full width
Half width
Letters
ＡＢＣａｂｃABCabcNumbers
１２３４５12345Katakana
ガッツポーズｶﾞｯﾂﾎﾟｰｽﾞSpace
山田 太郎山田 太郎