Inserting a blank page between PDFs when merged

I was already using Sejda.com PDF Desktop for some PDF editing functions, and recently had to merge a large number of PDFs. Under 'options' next to the merge button once I'd added the files, it allowed me to automatically insert a blank page after odd page numbered PDFs, ensuring the new PDF always started on the right, along with a raft of other options to dictate how you wanted it to treat bookmarks etc.

My work had me investigate whether it would be worthwhile puchasing an Acrobat Pro licence so I signed up to the free trial to investigate. I found that while Adobe was great at some functions, especially editing, it wasnt so much better the Sejda that it justified the nearly 4x price increase. It also didn't allow me the option to convert PPTX files to PDF using the handout format that the 'Save As-PDF' function within PowerPoint did, and when merging PDFs it had a fraction of the available options that Sejda did, particularly not having the insert blank page function.

If you're still interested, I'd check out Sejda, and if you want to try it out to see if it fits the bill, I first purchased the week-long licence and once I proved how good it was immediately signed up for the annual once that was finished.

If you have the option enabled to add bookmarks that point to the first page of each merged file then it can be done with a script, yes. Otherwise you'll need to find some other way of telling the script where each file begins (or ends), or perform the entire operation using a script, in order for it to be able to do that.