Free PDF Tool · Split

Split PDF by Bookmarks

Run split pdf bookmarks in your browser. Free, private, no signup — your selected files are processed in your browser and are not uploaded to our server.

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Drop your file here

or click to browse from your device

Accepts: .PDF

About this Split PDF by Bookmarks

Split a bookmarked PDF into section PDFs using its outline/bookmark tree with our split pdf bookmarks tool. The tool reads the document outline with PDF.js, resolves each bookmark to a page number, and creates one output PDF per bookmark section. If the PDF has no bookmarks, use Split PDF instead.

Pages are copied without rasterizing, so visual quality is normally preserved. The output PDF is rebuilt, so file structure, metadata, bookmarks, signatures, forms, or object byte order may change. The split happens in your browser using pdf-lib, so the selected file is processed in your browser and is not uploaded to our server.

Your privacy is the default. Your selected files are processed in your browser and are not uploaded to our server. This bookmark-splitting operation runs client-side using PDF.js to read bookmarks, plus pdf-lib and JSZip to create the output ZIP. Closing the tab clears the working session from this page; downloaded files remain on your device.

This tool is free to use with no signup required. Large files may be limited by your browser’s memory and device performance. Part of PDF Tools Base, a privacy-first collection of 161 PDF utilities. Bookmark the page for next time, and explore related tools in the footer below.

How to use the Split PDF by Bookmarks tool

  1. Drop your PDF file.
  2. Choose bookmark depth (level 1, level 2, or all).
  3. Click Process.
  4. Download the ZIP of section PDFs.

Why use PDF Tools Base?

100% Browser-Based

Split PDF by Bookmarks processes selected files in your browser. Your selected files are processed in your browser and are not uploaded to our server.

No Server Upload, No Signup

Your selected files are processed locally in your browser. No account, no server upload, no email needed.

No Watermark Ever

Outputs are clean. We never stamp our brand or a paywall watermark on your files.

Free to Use

No accounts and no signup. Use the tool as much as you need within reasonable browser limits.

Works on Every Device

Windows, Mac, Linux, iPhone, iPad, Android, Chromebook. Any modern browser.

Built on Open Source

Powered by pdf-lib, JSZip, and PDF.js for browser-side bookmark-based PDF splitting.

Common uses for split pdf bookmarks

Split manuals by chapter

Create one PDF per top-level bookmark in a manual.

Share a section

Send just the contract appendix to a colleague.

Archive selectively

Keep only the pages you need long-term.

Export sections

Export each bookmarked contract or report section to its own PDF.

Frequently asked questions

Is Split PDF by Bookmarks safe to use?

Yes. Everything happens in your browser. Your selected files are processed in your browser and are not uploaded to our server. Closing the tab clears the working session from this page; downloaded outputs remain on your device until you delete them.

Do I need to register or sign in?

No. No account, no email, no sign-up. Open the page and start using the tool immediately. Free to use, no signup needed.

Is there a watermark on the output?

No. PDF Tools Base never adds a watermark or branding to your output. Your final file is clean — just what you produced from the original.

Is there a file size limit?

There’s no fixed limit. Since processing uses your device’s memory, phones may struggle with PDFs over 50–100MB; desktops may handle larger PDFs but can still fail on very large or complex files. Large PDFs may be slow or fail depending on browser, device memory, page count, PDF complexity, and bookmark count — try a smaller PDF or a desktop browser.

Does this work on mobile devices?

Yes. The tool works on all modern mobile browsers: Chrome on Android, Safari on iOS, Firefox, Edge, Brave. The drag-and-drop also accepts files from your phone’s file manager.

Does this work without bookmarks?

This tool splits using the PDF outline/bookmark tree. One output PDF is produced per bookmark section. For manual page ranges, use Split PDF.