Interleave PDF (Merge Odd and Even Scans)

How to do it

1. 1
   Choose your settings

   Fill in the details or pick the options you need.

2. 2
   See the result

   The preview updates right away as you change things.

3. 3
   Download or save it

   Save the result to your device. Nothing is sent to or stored on a server.

About this tool

Add two PDFs and the tool alternates their pages: page 1 of the first, page 1 of the second, page 2 of the first and so on. Tick the option if the second file was scanned from the back, which is the usual case when you flip a stack and scan the reverse sides.

Fix a double-sided scan

With a single-sided document feeder you scan all the front sides first, then flip the stack and scan the backs. The backs come out in reverse order. Add the fronts as the first file and the backs as the second and keep the reverse option ticked to get the right order.

Different lengths

If one file has more pages, the extra pages are added at the end so nothing is lost.

Privacy

Both files stay on your device.

Tips for best results

Work on a copy of your file and keep the original until you have checked the result. Open the output before you send it to a portal, an employer or an office, and look at every page. If a size limit applies, check how the receiving site measures it, because some count a kilobyte as 1000 bytes and others as 1024. All processing happens inside your browser tab on your own device, so large files depend on your device memory and may take a little longer on a phone.