🧹 行过滤Line Filter
按包含、等于、正则、开头、结尾或长度，保留或删除文本中的行，支持反向匹配（不满足条件的才保留）。Keep or remove lines by contains, equals, regex, starts/ends with or length, with an invert option.
① 输入文本① Input
② 过滤规则② Filter rule
第二条件（组合过滤，可选）Second condition (optional)
③ 过滤结果③ Result
使用说明How to use
怎么用How to use
- 输入多行文本Enter multiple lines
- 设置匹配条件（包含/正则/长度）与保留或删除Set a condition (contains/regex/length) to keep or drop
- 查看过滤后的行Review the filtered lines
示例：只保留含 apple 的行Example: Keep only lines containing "apple"
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.
选择「保留匹配的行」或「删除匹配的行」，再设定匹配方式。选「按长度」时可设置行的字符数条件。勾选「反向匹配」会保留不满足条件、删除满足条件的行。Pick keep or remove, then choose how to match. With “By length” set a character-count condition. “Invert” keeps non-matching lines instead.