Alternate and mix PDF pages
Interleave pages from two or more PDFs, with an option to reverse a file, to rebuild double-sided scans in order. Free and private in your browser.
- Files never leave your device
- Free, no sign-up
- No watermark
About Alternate & Mix PDF Pages
Scanned the front sides of a stack of paper, flipped it and scanned the backs? This tool rebuilds the document in the right order by taking page 1 from the first file, page 1 from the second, then page 2 from each, and so on. Reverse the second file when the backs were scanned last page first, which is how most single-sided scanners work. If one file is shorter, its leftover pages are simply appended. All processing is done in your browser.
How to use Alternate & Mix PDF Pages
- 1
Add the PDF with the front sides and the PDF with the back sides. You can add more than two files.
- 2
Tick reverse for any file that was scanned in reverse order.
- 3
Click Alternate to interleave the pages.
- 4
Download the combined PDF with pages in reading order.
Why use this tool
- Rebuilds double-sided documents from two single-sided scans.
- Reverse option for back-side scans that come out last page first.
- Works with more than two files.
- Leftover pages from a longer file are appended instead of lost.
- Pages are copied without loss of quality.
Frequently asked questions
It means taking pages from each file in turn, A1, B1, A2, B2, instead of putting one file after the other as Merge PDF does.
When you flip a stack to scan the back sides, the last page comes out first. Reversing restores the correct order before interleaving.
Pages are interleaved while both files have pages left, then the remaining pages of the longer file are added at the end.
No. The files are combined in your browser and never leave your device.
Yes. There is no account, no watermark and no usage limit. The tool runs in your own browser, so there is no server cost to charge you for.
Yes. It runs in any modern browser on Android and iOS as well as on Windows, macOS and Linux, with nothing to install.
Related tools
All PDF tools →- Merge PDFCombine multiple PDF files into one document in seconds.
- Organize PDFRearrange PDF pages by dragging thumbnails and remove the pages you do not need.
- Scan to PDFScan documents with your phone or webcam, auto-crop and enhance the pages, then save them as one PDF.
- Split PDFSplit a PDF into single pages, custom page ranges, every N pages or files under a size limit.
- Compress PDFReduce PDF file size by re-encoding page images at the quality you choose, or strip metadata losslessly.
- Rotate PDFRotate all pages or only selected pages of a PDF by 90, 180 or 270 degrees and save it permanently.