About this tool
What Split PDF by Bookmarks does
Every bookmark that points at a page becomes a chapter: the tool copies the pages from that chapter’s start up to the next chapter, saves them as a separate PDF and names the file after the bookmark title. A 12-chapter manual becomes 12 files in one run, with no page ranges to work out by hand. Each part keeps its own bookmarks, page labels and metadata, and the whole job runs in your browser.
- Chapters come from the documentBookmark titles and their target pages define both the cut points and the file names.
- Top level or every levelSplit on top-level chapters, or include sub-bookmarks when the document has a deep outline.
- Pick only what you needUntick chapters you do not want; the rest are exported in document order.
- Structure kept per partEach part keeps the bookmarks that fall inside it, plus page labels and metadata.
Quick guide
How to use Split PDF by Bookmarks
- 1
Add the PDF
Choose a document that already has bookmarks — most manuals, ebooks and reports do.
- 2
Review the chapters
The chapter list shows each bookmark with its page range; untick anything you do not need.
- 3
Split and download
Run the tool and download a ZIP with one PDF per chapter.
FAQ
Frequently asked questions
What if my PDF has no bookmarks?
The tool says so straight away and suggests the regular split tool, which cuts by fixed page ranges. Bookmarks cannot be invented from page content.
How are the chapters cut?
A chapter runs from its bookmark page to the page before the next chapter starts; the last chapter runs to the end of the document.
What if two bookmarks point at the same page?
Only the first is used, otherwise the second one would produce an empty file.
Do I keep the bookmarks inside each part?
Yes. Every part keeps the bookmarks whose target page falls inside it, and bookmarks pointing outside the part are dropped, exactly like the split tool.