🔡 全角半角转换Full / Half Width

把半角英数标点（如 ABC123,.）转成全角（ＡＢＣ１２３，．），或反向转换。常用于统一排版、提交表单前清理与数据库清洗。Convert half-width ASCII (ABC123,.) to full-width (ＡＢＣ１２３，．) and back. Handy for uniform typesetting and form/database cleanup.

① 转换方向① Direction

② 输入与输出② Input & Output

使用说明How to use

怎么用How to use
  1. 输入全角或半角字符Enter full- or half-width chars
  2. 选择转换方向（半→全 或 全→半）Choose direction (half→full or full→half)
  3. 查看转换结果Review the result

示例：ABC123 → ＡＢＣ１２３Example: ABC123 → ＡＢＣ１２３

全程在你的浏览器本地完成，文本不会上传服务器。Runs entirely in your browser; your text is never uploaded.

把全角字母数字与标点转成半角，或反过来；可仅转换字母数字。粘贴文本后即时预览结果。Convert full-width letters, digits and punctuation to half-width, or the reverse; optionally only alphanumerics. Results update as you paste.