PDF分割

Spread Splitting

Cuts each two-page spread into two single pages, so a Booklet step imposes them correctly.

Detection measures every page and compares them: a spread is a page twice as wide (or twice as tall) as another page at the same size on the other axis. Only pages matching the detected spread size are cut; single-width covers pass through untouched, so the page count stays right. Auto splits only when the evidence is unambiguous. If every page is the same landscape size there is no narrower page to compare against — one wide page and two pages side by side are geometrically identical — so Auto reports what it suspects and declines to cut; choose "Split all" to confirm. "Off" keeps the step in place without applying it. Spread splitting always runs on the source pages before any layout step, whatever order the steps are in.

Split Settings

Set how many pages each output file should contain.

Chunk mode: every output file gets the same number of pages (the last file may have fewer if the total doesn't divide evenly). Visual mode: click between page thumbnails to place split boundaries manually — useful when chapters or sections don't have uniform page counts.

Preview

Shows the split plan — output files and page ranges, or the detected spread count.

In Chunk mode this lists the output file names and their page ranges. In Spread mode it reports how many spreads were detected, the detected spread size and cut direction, how many single pages are passing through untouched, and any pages skipped for having an unexpected size.

Visual Pages

Interactive page thumbnails — click between pages to toggle split points.

Each red line marks a split boundary. Click to add or remove. The resulting files are listed below with their page ranges. Drag to reorder split points is not supported — click to toggle on/off instead.

Action

Download all split files as a single zip archive.