PDF tools · Merge and split

Alternate and mix

Interleave pages of several PDFs, e.g. odd and even pages scanned separately. Free without an account; sign in to run it from your app too.

PDF files · 2 to 20 files, 25 MB together

Take back to front File numbers whose pages run last to first, e.g. "2" for even pages scanned in reverse.

Result

The same with the API

curl https://pdfember.com/api/v1/tools/alternate-mix \
  -H "Authorization: Bearer $PDFEMBER_KEY" \
  -F "files[][email protected]" \
  -F "files[][email protected]" \
  -F "reverse=2" \
  -o out.pdf