純本機私密執行的 Full-width ↔ Half-width Converter (全角 / 半角)

Convert between Japanese Zenkaku (Full-width) and Hankaku (Half-width) Katakana, Alphanumerics, and Symbols for banking forms and databases. 100% 瀏覽器本機處理，無需註冊帳號，零伺服器上傳。