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Split by Bookmarks

Split by bookmark/chapter structure

How it works:

  1. 1Upload PDF with bookmarks
  2. 2Select bookmark level
  3. 3Click "Split by Bookmarks"

About this tool

Carve a PDF apart along the lines of its own bookmark or chapter structure, turning each bookmarked section into its own standalone file. The tool reads every bookmark in the document and lets you decide which level to split on, whether that's top-level chapters, deeper subsections, or whatever tier matches your organizing logic. That makes it especially handy for taming sprawling technical manuals, academic textbooks, legal filings, or any PDF built on a clear hierarchy. Quality holds steady throughout: each piece keeps its formatting, images, and sharp text, and the relevant bookmarks travel along inside it. Privacy is built in because the entire operation runs locally in your browser, with no upload step involved at any point. Once split, the files can be saved individually or collected together in a ZIP archive. It's a great fit for students sorting course readings into chapters, professionals wrangling large document libraries, or anyone needing to reduce a structured PDF into bite-sized parts.

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Split PDF

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Split by Size

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Extract Pages

Create a new PDF with only selected pages

Frequently Asked Questions

The tool reads your PDF's existing bookmark or chapter structure and splits at those points, turning each bookmark section into its own separate file. You pick which bookmark level to split at, so the divisions match your document's outline.
Yes. The tool detects all bookmarks and lets you select the level, whether that's top-level chapters, subsections, or deeper nesting. This flexibility lets you break a document into a few large chapters or many smaller parts.
This tool relies on an existing bookmark structure to determine split points, so it works best with PDFs that already have chapters or an outline, like manuals, textbooks, or legal documents. Without bookmarks, there are no markers to split on.
Yes. Each split file preserves the bookmarks within it, along with all formatting, images, and text quality from the original. The chapters remain navigable, so your organized structure carries over into the smaller documents.
Absolutely. All processing runs locally in your browser, so your PDF is never sent to a server. Your structured documents stay on your device, and you can download the split files individually or as one ZIP archive.

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Guides and explainers related to this tool