Alternate and mix two PDFs
Scanned all the fronts, then all the backs? Mix the two files page by page to rebuild the original double-sided document.
- Processed on your device — never uploaded
- Free · Private · No sign-up
Drop two PDFs here
or
Processed on your device — never uploaded
How it works
- 1
Add the PDF with the front sides, then the one with the back sides.
- 2
Reverse the second file if your scanner fed it backwards.
- 3
Download the combined PDF.
Frequently asked questions
What if the files have different page counts?+
Pages alternate while both files have pages left; the rest are added at the end.
Why reverse the second file?+
Many scanners output the back sides in reverse order. Turn on “Reverse second file” to fix it.
Is it free?+
Yes — free, private and with no sign-up.