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比较两个 PDF

逐页查看两个版本之间的具体变化——删除和新增的文字直接在页面上高亮显示。

工作原理

1. 上传原始 PDF 和修订后的 PDF。2. 我们逐页进行比较。3. 对于有差异的页面,原始页面上被删除的文字会用红框标出,修订页面上新增的文字会用绿框标出,同时提供逐字对比。

这也会比较格式或图片吗?

红/绿高亮基于文字比对,因此即使段落重新排版,也能捕捉到确切的文字改动。对于非文字的变化——比如换了一张图片、颜色或布局变了——可以打开"高亮页面上的变化",它会将两个页面叠加,标出每一个不同的像素。

如果两个文件的页数不同怎么办?

任一文件中多出的页面会被标记为"仅存在于此文件",而不是拿去和空白内容比较。

这会把我的文件上传到哪里吗?

不会——比较完全在您的浏览器中进行,文件不会离开您的设备。

What about scanned PDFs with no text layer?

The word-by-word diff needs a text layer, so two scanned pages with no extractable text will show as "same" even if the scans look different. For scanned pages, use "Highlight what changed on the page" instead — it compares pixels, not text, so it works whether or not the PDF has real text underneath.

Can it tell if pages were reordered or inserted?

No — pages are compared by position: page 1 against page 1, page 2 against page 2, and so on. If you insert or reorder a page partway through, every page after that point will show as "different" even if the content itself didn't change, since it's now lined up against the wrong page.

Can I compare a PDF to a Word document, or two Word docs?

No, this tool only compares PDF to PDF. If you have a Word file, export or print it to PDF first, then compare the two PDFs.