All tools
Compare Text
Spot every difference between two blocks of text, line by line.
Original
Changed
Both texts are compared in your browser — nothing is sent to a server.
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Compare Text — frequently asked questions
Does it compare word by word or line by line?+
Line by line, using a longest-common-subsequence diff — the same approach code review tools use.
Is there a size limit?+
It handles typical documents easily. Very large inputs (tens of thousands of lines) may be slow because the diff is computed in your browser.
Is my text uploaded?+
No. Both versions are compared locally and never sent anywhere.
你们会把我的文件上传到服务器吗？+
不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。
有文件大小限制吗？+
我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。
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