🧹 删除重复行Remove Duplicate Lines
在线去除文本中的重复行，可忽略大小写和首尾空格，保留原有顺序。Remove duplicate lines from text, optionally ignoring case and whitespace, keeping order.
使用说明与常见问题How-to & FAQ
「删除重复行」是什么？What is the Remove Duplicate Lines tool?
在线去除文本中的重复行，可忽略大小写和首尾空格，保留原有顺序。Remove duplicate lines from text, optionally ignoring case and whitespace, keeping order.
如何使用「删除重复行」？How do I use the Remove Duplicate Lines tool?
在「删除重复行」中，在上方填写或选择所需内容，结果会实时显示在下方；所有处理都在浏览器本地完成。In the Remove Duplicate Lines: Fill in or choose the options above and the result appears below instantly; everything runs locally in your browser.
会改变行的顺序吗？Does it change line order?
不会，保留每行第一次出现的位置。No, the first occurrence of each line keeps its position.
处理大段文本会卡吗？Can it handle long text?
「删除重复行」在浏览器中直接处理，几 MB 以内的文本通常瞬间完成；文本不会离开你的设备。The Remove Duplicate Lines runs in your browser; text up to a few MB is usually processed instantly and never leaves your device.
「删除重复行」免费吗？需要注册吗？Is the Remove Duplicate Lines free? Do I need an account?
「删除重复行」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Remove Duplicate Lines is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.