免费 PDF Compare
Compare two PDFs page by page — side by side, as an onion-skin overlay, or with changed areas highlighted in red. Both files stay in your browser.
将文件拖放到此处或点击浏览
PDF 无文件大小限制
将文件拖放到此处或点击浏览
PDF 无文件大小限制
你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。
Drop two PDFs to compare them page by page — side by side, as an onion-skin overlay, or with changed areas highlighted. Both files stay in your browser.
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工作原理
Tools like Draftable and Adobe charge for good PDF comparison, and PDF24 uploads your files. This compares two PDFs visually in your browser — neither file leaves your device.
- 1You drop in two PDFsAn "original" (A) and a "changed" (B). Both are rendered locally with pdf.js.
- 2Each page is rendered to an imageThe matching page from each document is drawn to a canvas at the same scale, in your browser.
- 3You choose how to compareSide by side, an onion-skin overlay with an opacity slider, or a pixel-difference view that highlights changed areas in red and reports the percentage changed.
- 4You page through the documentsStep through every page; pages that exist in only one file are flagged.
Contracts and drafts are sensitive, and most comparison tools upload them. Here everything is rendered and compared on your device — ideal for reviewing revised agreements, statements, and documents privately.