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Alternate Pages from Two PDFs

Alternate PDF pages from two scan files to rebuild a double-sided household document, reversing the backs when they were scanned last page first.

Two PDFs contain three labeled pages each. The output should contain six pages in the file order or alternating order you choose.

Your documents stay on this device. Tool downloads and usage statistics do not include file contents.

Local limits: Max files: 2 / Max single file: 10 MB / Max total size: 20 MB / Max pages in total: 200

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A practical guide

Put the front and back scans back in reading order.

  1. Choose exactly two PDFs, with the front-side scans first and the back-side scans second.
  2. Choose Alternate, or Alternate and reverse the second file when its pages were scanned backwards.
  3. Create the PDF and check the first, middle and last page pairs before continuing.

Try this example

A six-page form scanned as fronts 1, 3, 5 and backs 6, 4, 2 becomes pages 1 through 6 when the second file is reversed. Check the completed form order before filing it.

Before

  • Fronts 1,3,5
  • Backs 6,4,2

After

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
Input and expected output for this task. Illustrative example.

Before you start: This mode requires exactly two PDFs. If one file has extra pages, unmatched pages are appended at the end; confirm pairing and order yourself.

Review page order
What you get

Combine front and back scans from exactly two PDFs. Reverse the second file when its pages were scanned backwards.

Limits and important details

Local limits: Max files: 2 / Max single file: 10 MB / Max total size: 20 MB / Max pages in total: 200

Alternate: exactly two PDFs, 10 MB each, 200 pages total and 40 MB output. No compression or guaranteed bookmark, interactive-form or digital-signature preservation. Password-protected PDFs are unsupported. Check page order before sharing.

Example

Fronts 1, 3, 5 and backwards-scanned backs 6, 4, 2 become 1, 2, 3, 4, 5, 6 when the second file is reversed.