How to Split a Scanned PDF into Single Pages?

When you scan a book or a manual with a scanner or your phone, you often get a PDF where "two pages are stuck on one wide page." Open it on a phone or e-reader and the text shrinks; paging is awkward. Here's how to turn it back into normal single pages.

Why scans are two pages in one

Many scanners and scan apps treat the open spread as "one page" by default, producing a landscape page split left and right. It saves pages and file size, but the reading experience is poor.

The problem with manual splitting

Cropping and re-merging in Acrobat is tedious. Worse, if the document also contains genuinely single pages — a cover or an illustration — a brute-force batch crop will cut those in half too. Long books are especially time-consuming.

How automatic splitting works

UniPagePDF's "Split Landscape Spreads" scans the document and splits only the landscape pages, leaving portrait single pages (cover, illustrations) untouched; it then divides each spread down the fold and automatically reorders into the correct sequence "left 1, right 1, left 2, right 2…". See the step-by-step: How to split landscape two-page scans.