How to Alternate Merge PDFs – Step by Step

The Alternate Merge tool interleaves pages from two PDFs — page 1 from file A, page 1 from file B, page 2 from A, page 2 from B, and so on. Perfect for merging scanned double-sided documents.

Step-by-Step Guide

Open the Alternate Merge page.

Upload two PDF files you want to interleave.

Optionally check 'Reverse second PDF' if the back sides were scanned in reverse order.

Click Merge and the pages are interleaved automatically.

Download the merged result.

Tips for Best Results

• This is essential when merging front-and-back scans from an automatic document feeder.
• If your second PDF is in reverse order, enable the reverse option to fix alignment.
• Both PDFs should have the same number of pages for a clean interleave.