纯本地私密运行的 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% 浏览器本地处理，无需注册账号，零服务器上传。