Scan an open book and the scanner sees one wide sheet, not two pages. Every spread comes out as a single landscape page with two pages of text on it, which reads badly on a phone, prints two-up whether you want it or not, and makes page numbers meaningless. This tool cuts each page in two and writes the halves out in reading order, so a fifty-page scan of a twenty-five-spread book becomes the hundred pages it always was.
How to use Split Pages in Half
- Add the PDF holding the spreads.
- Choose where to cut. Down the middle splits into a left and a right page, which is what a book scan needs. Across the middle splits into a top and a bottom.
- If the spine isn't in the middle, drag the dashed line on the preview. List any pages to keep whole, such as a cover, or let single pages be found for you.
- Choose which half comes first. Left first suits most books; right first suits Arabic, Urdu, Hebrew and traditional Japanese, which are read the other way.
- Select Split Pages in Half and download the result.
What the cut actually does
Each page is measured and divided in two at the position you choose, and each part becomes a page of its own.
- The halves keep their scale: A half is not stretched back out to a full sheet. Text on the result is the same physical size it was on the spread, so nothing is distorted and a scan stays as sharp as it was.
- Nothing is re-rendered: The original page is placed into each half and shown through a window onto the part you want. The text, images and vectors are the same objects, not a photograph of them.
- Mixed page sizes are fine: Every page is measured on its own, so a document where some spreads are wider than others still splits each one at the same share of its width.
- Rotation is respected: A page marked as rotated is cut along the line you see on screen, not along the unrotated sheet underneath.
Getting the order right
The halves are written out one page at a time, and which one leads depends on how the book is read.
- Left first: For English and most European languages the left page of a spread is the earlier one, so it is written first. This is the default and is right the large majority of the time.
- Right first: Arabic, Urdu, Hebrew and traditional Japanese books open the other way, so the right page of a spread comes first. Choosing right first keeps such a scan in reading order.
- Scanned booklets: A folded booklet scanned sheet by sheet pairs its pages as 8 and 1, 2 and 7, and so on. Tick Repaginate and the halves are put back in reading order.
- Checking before you commit: Look at the first four pages of the result. If they run second, first, fourth, third, the order setting is the wrong way round.
Getting a clean result from a scan
- Crop before or after: Scans usually carry a black edge or the shadow of the spine. Crop PDF trims an even margin from every page, and running it after the split treats each page separately.
- Straighten first: A spread that went through the feeder at an angle splits along a line that is not the spine. Deskew PDF before splitting gives a much cleaner cut.
- Covers: A scan that begins with a single cover page rather than a spread can keep it whole: list it under Pages to leave whole, or tick Leave single pages whole.
- Text you can search: Splitting does not change whether text is selectable. If the scan is a picture of a page, run OCR PDF on the result to make it searchable.
When people use Split Pages in Half
A book scanned on a flatbed
Every spread arrives as one wide page. Splitting turns the file into real pages, so it reflows sensibly on a phone and prints one page to a sheet.
Two-up handouts back into slides
A handout printed two slides to a sheet and then scanned becomes one slide per page again, ready to project or re-import.
Ledgers and registers
Wide accounting books photographed as spreads split into single pages that fit a screen without constant sideways scrolling.
Limitations to know
Every page is cut by one straight line at the same position, so a spine that wanders from page to page still leaves slivers; straighten and crop first. The halves are placed into new pages, so the file is usually a little larger than the original even though no image is re-encoded. Bookmarks, form fields, links and annotations are not carried into the split pages.
Split Pages in Half: common questions
Will splitting make my scan blurry?
No. Each half shows the original page through a window rather than re-photographing it, so images keep their original pixels and text stays as sharp as it was. A half is also left at its own size rather than being stretched, which is what would soften a scan.
What if the spine of the book is not exactly in the middle?
Drag the dashed line on the preview, or type a position, to move the cut. It applies to every page, so deskew the file first if the spine drifts from page to page.
Can I split only some of the pages?
Yes. List the pages to keep whole, such as the first and last for single covers, or tick Leave single pages whole to have portrait pages among landscape spreads found for you.
What does Repaginate do?
A folded booklet scanned sheet by sheet comes out with its pages paired as 8 and 1, 2 and 7, and so on. Repaginate puts the halves back into reading order, 1 to 8.
Which way round should I set the order for an Urdu or Arabic book?
Choose right half first. Those books are read from right to left, so the right-hand page of a spread is the earlier one and needs to be written out before the left. For English and most European languages, leave it on left first.