Split PDF by Bookmarks
Overview
Long PDFs with chapter bookmarks split cleanly into chapter files using the bookmark tree as the split guide.
How to Use This Tool
Upload PDF, configure the split mode (page range, equal parts, by size, etc.), download a ZIP of the resulting PDFs.
Ready to get started? It's free, no registration required, and your files never leave your device.
Split PDF →Frequently Asked Questions
How many split parts can I produce?
No artificial cap. Limited by browser memory — typically 200+ parts work fine.
Are bookmarks preserved in split output?
Bookmarks scoped to each split part carry over. Bookmarks pointing across split boundaries are dropped.
Can I undo a split?
Use the Merge tool to recombine the parts in any order.