關於此工具
並排比較兩個 PDF 的差異。識別文字的新增和刪除。
比較 PDF
編輯並排比較兩個 PDF 的差異。識別文字的新增和刪除。
文件 A（原始）
將 PDF 拖曳到此處
處理 ≤ 50.0 MB
文件 B（修訂）
將 PDF 拖曳到此處
處理 ≤ 50.0 MB
架構層面的隱私保護
所有處理都在您的瀏覽器中進行。您的 PDF 永遠不會上傳到我們的伺服器。無需帳戶，無使用限制。
工作原理
- 1選擇 PDF — 永遠不離開你的裝置
- 2按需配置工具
- 3結果儲存到下載
Frequently asked questions
Is this PDF compare tool free?
Yes, completely free with no usage limits.
How does the comparison work?
We extract the text of each PDF with PDF.js and compute a word-level diff. Added text is highlighted green, removed in red.
Does it work with scanned PDFs?
No — scanned PDFs have no embedded text. Run OCR on both first, then compare the .txt outputs separately.
Will my PDFs be uploaded to a server?
No. Both files are read and diffed in your browser. Nothing leaves your device.
What format is the output?
A self-contained HTML report you can open in any browser, including in dark mode.