Split PDF by Bookmarks
Split a PDF into a separate file for each top-level bookmark.
Drop a PDF here or click to browse
Your file stays on your device — nothing is uploaded.
100% private — your files are processed in your browser and never uploaded to a server.
The Split PDF by Bookmarks tool uses a PDF's outline to divide it into logical sections. Each top-level bookmark becomes the start of a new file, making it ideal for splitting books or reports into chapters. It runs entirely in your browser.
Why use this tool
Chapter-aware splitting
Each top-level bookmark starts a new, neatly named file.
No manual page counting
The PDF's own outline decides the split points for you.
Stays on your device
The whole process runs in your browser with no upload.
How to use it
Open your PDF
Select a PDF that contains bookmarks or an outline.
Review the bookmarks
Check the top-level bookmarks the tool detected.
Download the sections
Save one PDF file per bookmark section.
Frequently asked questions
What if my PDF has no bookmarks?+
The tool needs an outline to split by — use a page-based splitter if your PDF has no bookmarks.
Does it use nested bookmarks?+
It splits at the top-level bookmarks, so each main section becomes its own file.
Is my PDF uploaded?+
No. The split happens in your browser, keeping your document private.
Is the tool free?+
Yes, completely free with no account and no watermark.