Split PDF by Bookmarks
Break a big PDF into chapters at bookmark points — each chapter a separate PDF, all in one ZIP. Split chapters easily.
The PDF must have bookmarks (outline) — otherwise it cannot be split.
Level 1 = only main chapters; Level 2 = headings inside chapters will also be split
| # | Chapter | Pages |
|---|
How to use
- Select a PDF with bookmarks.
- Choose a level — only main chapters or sub-sections too.
- Press Split by Bookmarks, then download the ZIP.
Note: The PDF must contain bookmarks. If the file has no bookmarks, the tool will tell you — in that case use the page-range split tool.
Frequently Asked Questions (FAQ)
What does split PDF by bookmarks do?
It breaks a big PDF into chapters at its bookmark points — each chapter becomes a separate PDF, all downloaded in one ZIP.
What if my PDF has no bookmarks?
The tool needs an outline to split by. If the file has no bookmarks, the tool tells you — use the page-range split tool instead.
Can I split sub-sections too?
Yes. Choose 2 levels to also split headings inside the main chapters; top-level only splits just the main chapters.
Is my file uploaded anywhere?
No. Your file is processed in your browser and is not uploaded anywhere. The tool is free with no signup.