Split scanned PDF pages made simpler, in your browser

A book scanner often captures both facing pages as one wide image. That preserves the spread, but it can make reading on a phone or following a single-page sequence awkward. This tool separates each PDF page into two visible regions and places those regions on consecutive output pages. You can split left from right or top from bottom, move the split away from the center, reverse the pair order, and keep the first page whole when it is a cover.

The operation is useful for reading copies of books, manuals, and two-page scans. It does not recognize chapter boundaries or decide which half should be read first. It also does not correct a curved book gutter, remove fingers, straighten a tilted scan, or run OCR. Those are different tasks. Begin with a source whose orientation and overall scan quality are already suitable, then inspect the split result before relying on its reading sequence.

Add a PDF and choose the left-and-right direction. Leave the split position at fifty percent for a centered gutter. Process the file, inspect the first output pages, and download the result. In the normal order, the left half of source page one becomes output page one, and its right half becomes output page two. The next spread follows in the same way. Ten source spreads therefore normally produce twenty output pages.

A split position is measured across the visible page, not from a printed page number or a detected book spine. For a scan with a wide outer border, the geometric midpoint may not match the gutter. Look at several representative spreads, including ones near the beginning and end of the book. If the book moved during scanning, one split position may not work for the whole document. Divide such a file into consistent groups before processing each group.

Yes. The position accepts values from ten to ninety percent, measured from the left edge for a left-and-right split and from the top edge for a top-and-bottom split. A value of forty-five percent gives the first region forty-five percent of the visible width or height and the second region the remainder. The halves do not need to be equal. They meet at the chosen boundary without an intentional gap or overlap.

Use an off-center value when the scanner included more border on one side, or when one facing page occupied a different width. Check text close to the gutter. A line that crosses letters can hide part of a word in one output page and put the remainder on the next. Moving the line is a geometric adjustment; it cannot recover content that disappeared into a dark book fold or was never captured by the scanner.

Reverse order swaps the two regions produced from each source page. For a left-and-right split, the right side comes first. For a top-and-bottom split, the bottom side comes first. The source pages themselves remain in their original sequence. This distinction is useful for books whose facing pages are intended to be read in the opposite direction from a typical left-to-right document.

Inspect a spread with obvious printed page numbers to confirm the choice. Do not rely only on the cover direction or the language of a title: bilingual books, inserts, and scanned collections may use different conventions. If the entire source document is backwards, swapping each pair is not enough. Use the organize tool to correct the source order or the final page sequence, then verify the beginning, middle, and end of the finished reading copy.

Enable the option to keep the first page whole. The first physical page is copied without splitting, while every later page is divided according to your settings. For a ten-page source, this produces nineteen output pages. It is useful when a scanner saved a single front cover before a series of facing-page spreads. The option refers to physical position one, regardless of the number printed on that page.

It does not automatically detect a back cover, title sheet, foldout, or single-page insert elsewhere in the document. If your source contains several different layouts, separate those sections first. You can process the spreads and then merge the untouched single pages back into the right positions. This takes an extra review step, but it avoids blindly dividing a single-page illustration or a full-width map that should remain intact.

This workflow changes the visible boundaries of copied PDF pages. It does not deliberately resample the scan into lower-resolution images. Each output region keeps its original physical scale, while its page boundary becomes smaller. A half-width region therefore is not automatically enlarged to fill A4 or Letter. A reader may zoom it to fit the screen, which can make the content appear larger without adding new image detail.

If you need every separated page on a standard paper size, use the resize tool afterward and choose whether to fit the content or preserve its physical size. Check a test page before printing the entire book. Scaling a low-resolution scan up can make its limitations more obvious. Splitting improves page organization and screen use; it cannot sharpen characters beyond the information already present in the source image.

No. The tool changes visible page boxes, and content outside those boxes may remain stored in the PDF. A different editor, a text extractor, or an image extractor may be able to access content that is not currently visible. The two output pages can also share or retain source resources. This is a reading-layout operation, not a secure way to remove confidential material.

Do not use a split boundary to hide a name, account number, or other information that must be removed from a shared document. Use a dedicated redaction process and verify its output separately. File size may stay similar or increase even though each page looks smaller, because a visible crop is different from physically deleting image pixels and rebuilding the file. Keep that distinction in mind when deciding what copy to distribute.

The chosen boundary may not match the real gutter, or the original scan may be skewed. A straight vertical boundary cannot follow a slanted or curved spine. Uneven outside borders can also make the two logical book pages occupy different proportions of the scanned image. Adjust the percentage for a consistent batch, but do not expect one number to fix a book that shifted position on every scan.

Preview the first eight output pages and reopen the download to inspect later spreads. Pay attention to running headers, page numbers, illustrations that cross the gutter, and captions near the edge. If an illustration intentionally spans both facing pages, a separated reading copy may interrupt it. Retain the original spread version as a reference, or keep that illustration together in a separately prepared document.

The tool accepts one unencrypted PDF no larger than 30 MB and with one to one hundred pages. It supports ordinary right-angle page rotations. Interactive forms, annotations, and links are rejected for this operation, because copying their behavior into split regions is outside this tool's scope. Unusual geometry or damaged files also produce an error. The selected document is processed in your browser rather than uploaded to a conversion service.

After saving, compare the output count with the expected two-pages-per-spread calculation, allowing for the optional whole cover. Check the first left-right pair, a middle pair, and the final pair. Confirm that the printed page sequence follows your intended reading direction and that the gutter has not cut important content. Keep the source file so you can return to the original spreads whenever a full-width view is needed.

Choose a tool for the next step and review each output.

• Separate mixed sections
• Reassemble your document