Split a PDF based on bookmarks/chapters

Automatically splits a PDF into separate files based on its bookmarks (table of contents). Each chapter becomes its own PDF, named after the bookmark title. Free, local in your browser.

Choose your PDF

Drop here or click to choose

Files stay on your device — nothing is uploaded

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Your file is processed in your browser and never uploaded.

How does it work?

1
Choose your PDF
Drag the PDF here. The bookmarks are read automatically.
2
Check the chapters
Review which pages belong to each chapter.
3
Split & download
Download all chapters as separate PDFs in one ZIP.

Frequently asked questions

What if my PDF has no bookmarks?

Use the bookmark generator tool first to automatically add bookmarks based on headings in the text.

Are my files uploaded?

No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.

Is it free?

Yes, completely free, without watermark or account. The site is paid for by ads.

Why in the browser?

PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.