Interleave Two PDFs
Alternate pages from two PDF files into one document
Interleave Two PDFs — what it does
Alternate the pages of two PDFs into a single document, taking one page from each in turn and letting you choose which file starts. Its classic use is a scanner that cannot do duplex: scan all the fronts, scan all the backs, and interleave them into the correct sequence.
When this tool helps
- Rebuilding a double-sided document from separate front-side and back-side scan passes.
- Alternating pages of a translated document with the original for a bilingual bundle.
- Merging matched pairs of pages, such as forms with their attached receipts.
How to use it
- Load the first PDF and the second PDF.
- Choose which document supplies the first page.
- Process the interleave.
- Download and verify the page sequence.
Accuracy, limits, and good practice
- If you scanned the reverse sides by flipping the whole stack, that PDF is in reverse order — run it through the reverse pages tool before interleaving.
- Both files should have the same page count; a mismatch leaves the surplus pages of one document appended at the end.
- Check the first four pages of the output. If front and back are transposed, swap the starting document and run it again.
Frequently asked questions
What if the two files have different page counts?
Interleaving proceeds while both have pages, and the remaining pages of the longer document follow at the end.
My back sides are upside down. Can this fix that?
No, use the rotate PDF tool on that file first, then interleave the corrected version.
Can I interleave three documents?
Interleave two, then interleave the result with the third — though the pattern that produces is rarely what people want.
Related tools on this site
- Edit PDF Metadata — Change title, author, subject, and keywords
- Search PDF Text — Search extracted PDF text and display matching pages with snippets
- CSV to JSON — Convert CSV rows into JSON objects
Everything above runs inside this page. Interleave Two PDFs needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
雙 PDF 交錯合併能做什麼
把兩份 PDF 的頁面交錯併成一份文件，兩邊輪流各取一頁，並可選擇由哪一份先開始。最經典的用途是掃描器不支援雙面：先掃完所有正面、再掃完所有背面，然後交錯成正確順序。
什麼時候用得上
- 從分開掃描的正面與背面，重建雙面文件。
- 把翻譯文件與原文逐頁交錯，做成雙語文件。
- 合併成對的頁面，例如表單與其對應的收據。
使用步驟
- 載入第一份與第二份 PDF。
- 選擇由哪一份提供第一頁。
- 執行交錯合併。
- 下載並確認頁面順序。
精確度、限制與實務建議
- 若背面是整疊翻面後掃的，那份 PDF 會是反序——請先用頁面反向排序工具處理再交錯。
- 兩份檔案頁數應相同；不一致時，較長那份多出來的頁面會接在最後。
- 檢查輸出的前四頁。若正反面顛倒，換一份當起始文件重跑即可。
常見問題
兩份頁數不同怎麼辦？
兩邊都還有頁面時持續交錯，較長文件剩下的頁面接在最後。
背面是上下顛倒的，可以修嗎？
不行，請先用 PDF 旋轉工具處理那份檔案，再交錯合併修正後的版本。
可以交錯三份文件嗎？
先交錯兩份，再把結果與第三份交錯——不過那樣產生的排列很少是使用者真正想要的。
本站相關工具
- 編輯 PDF 中繼資料 — 修改標題、作者、主題與關鍵字
- PDF 文字搜尋 — 搜尋提取出的 PDF 文字並顯示符合頁面與內容片段
- CSV 轉 JSON — 將 CSV 資料列轉換成 JSON 物件
以上步驟全部在這個頁面內完成，雙 PDF 交錯合併 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。