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Split PDF by Bookmark

Break a PDF into one file per top-level bookmarked section.

Select a PDF

Click to choose, or drop a file here

How to Split PDF by Bookmark

  1. 1

    Add your PDF

    It must have bookmarks.

  2. 2

    Split

    One file is created per top-level bookmarked section.

  3. 3

    Download the zip

    Every section, named after its bookmark.

Related PDF tools

Split PDFBreak a PDF into separate files by page range, or into equal chunks.Split PDF by File SizeBreak a PDF into chunks that each stay under a size you set — for email or upload limits.Add PDF BookmarksBuild a clickable outline (the Bookmarks panel) so readers can jump straight to any section.Extract pagesPull selected pages into a new PDF.

Split PDF by Bookmark — frequently asked questions

My PDF has no bookmarks — what happens?+

The tool tells you and you should use Split PDF with page ranges instead.

What about nested bookmarks?+

Only the top-level bookmarks are used as split points.

Do you upload my files to a server?+

No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The only exception is the AI tools, which send the extracted text (not the file) to Claude to do their work.

Is there a file size limit?+

There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.