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交替合併兩個 PDF
交錯合併兩個檔案的頁面，例如掃描的正反面。
運作方式
上傳您的兩個 PDF 並下載結果——頁面會依 A1、B1、A2、B2 的順序交替排列。
典型的使用情境是什麼？
單面掃描器的雙面掃描技巧：先把所有正面掃成一個檔案，再把所有反面掃成另一個檔案，這個工具會將它們交錯合併成正確的正反頁順序。
如果兩個檔案的頁數不同怎麼辦？
較長檔案中多出的頁面，會在較短檔案的頁面交錯完畢後，接續加在最後面。
Which file should I upload first, fronts or backs?
Upload the fronts as the first file and the backs as the second — the tool interleaves them in that order, A1 then B1, A2 then B2, and so on.
Do the two PDFs need the same number of pages?
No — if one has more pages, its extra pages are simply added to the end after the interleaving runs out.
Is this the same as duplex printing?
It solves the opposite problem — reassembling scans made on a single-sided (simplex) scanner back into the correct front-back reading order.
My scanner fed the back sides in reverse order — what do I do?
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Can I mix more than two files, or use a pattern other than one-for-one?
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My back-side scans have extra blank pages — will that mess up the order?
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