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比較兩份 PDF 檔案

逐頁精確呈現兩個版本之間的差異——刪除與新增的文字直接標示在頁面上。

運作方式

1. 上傳原始版本與修訂版本的 PDF。2. 我們會逐頁進行比對。3. 若某頁有差異,原始頁面會以紅框標示刪除的文字,修訂頁面則以綠框標示新增的文字,並附上逐字文字比對。

這個工具會比較格式或圖片嗎?

紅/綠標示是以文字為基礎,因此即使段落重新排版,仍能抓出確切的用字變動。若要比對非文字的變化——例如替換圖片、顏色或版面配置的改動——請開啟「標示頁面上的變化」功能,它會疊合兩個頁面,標出每一個不同的像素。

如果兩份檔案的頁數不同怎麼辦?

任一檔案中多出的頁面,會被標示為「僅存在於此檔案」,而不會拿來與空白頁比較。

這會把我的檔案上傳到任何地方嗎?

不會——比對完全在您的瀏覽器中進行。兩份檔案都不會離開您的裝置。

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.