Split PDF by bookmark

Split a PDF by its existing bookmarks directly in your browser. Detect the document outline, choose a bookmark level such as chapters or subsections, preview the sections that will be created, and save separate PDF files locally on your device. This tool works best for PDFs that already include a usable outline or table-of-contents bookmarks. Everything runs on your device with no uploads, no accounts, no server storage.

Input: PDF (.pdf)
Output: PDF split by bookmarks
All processing happens directly on your device

Good to know

This tool depends on bookmark data already embedded in the PDF. If the file has no usable outline, or if the bookmarks are incomplete or point to unexpected pages, bookmark-based splitting may not work as expected and a manual split method may be better.

  • Input: PDF files (.pdf).
  • Output: Multiple smaller .pdf files created from bookmark-based sections.
  • Bookmark levels: split by broader chapters or by smaller subsections, depending on the outline depth inside the PDF.
  • Section preview: review detected ranges before saving, or export only selected sections if needed.
  • Privacy: your PDFs never leave your device, nothing is uploaded to FileYoga servers.

Split a PDF using bookmarks

Add one PDF, detect the outline, choose the bookmark level, then save the split result.
Drop a PDF file here
or click to browse
Supports .pdf files. Files are processed in your browser and never uploaded to a server.

How bookmark splitting works

Split PDF by Bookmark uses the PDF’s built-in document outline to create separate files automatically. Instead of choosing pages one by one, you can split by chapters, sections, or subsections when the PDF already contains bookmarks that point to real pages.

When to use this tool

This tool is useful when a PDF already has a structured outline and you want the output files to follow that same organization automatically.

  • Split a book, handbook, or training manual into chapter PDFs.
  • Separate a long report into bookmarked sections instead of selecting page ranges manually.
  • Break a policy, specification, or technical document into structured parts.
  • Export only selected sections from a bookmarked PDF while keeping the original organization.

Need to split by pages or ranges instead? Use split a PDF by selected pages or page ranges. Need smaller files for upload limits? Try split a PDF by target file size. Need to pull only certain pages into a new file? Use extract selected PDF pages into a separate PDF.

Step-by-step: split a PDF by bookmark

Splitting a PDF takes just a few steps:

  • Add your PDF. Drag and drop a file into the box above, or click to choose from your device.
  • Detect bookmarks. The tool reads the PDF outline and finds usable bookmark destinations.
  • Choose a bookmark level. Split by top-level chapters or deeper levels if the PDF contains them.
  • Preview the sections. Review the generated page ranges and keep all or only selected ones.
  • Split PDF by bookmark. Save the generated PDF files to your device.

Bookmark levels explained

  • Level 1: usually top-level chapters, main headings, or major sections.
  • Level 2: usually nested sections or subchapters inside each main chapter.
  • Level 3 and deeper: smaller subsections for PDFs with a more detailed outline tree.

Not every PDF contains bookmarks, and not every bookmark outline is clean. Some PDFs have missing bookmarks, repeated destinations, untitled entries, or several bookmarks pointing to the same page. This tool works best when the source PDF already has a clear and reliable structure.

Privacy, limits and how this tool treats your files

FileYoga is built around a simple rule: your files stay with you. Bookmark splitting runs locally in your browser, so your PDFs are never uploaded to FileYoga servers.

Local-only processing

The bookmark analysis and split happen in your browser on your device. Your file is not uploaded, and the output PDFs are generated on your side.

No hidden copies

When you clear the file or close the tab, the tool stops using your PDF and does not save copies on a server.

No artificial limits

No paywalls or quotas. The only limits come from your device’s memory and your browser.

No account required

Use the tool without signing up. Open the page, split your PDF, save the result, and leave when you are done.

Tips for best results

  • Start with Level 1 if you want broader chapter-style files.
  • Try a deeper bookmark level only when you need smaller subsections.
  • Review the generated page ranges before saving, especially in long or deeply nested documents.
  • If several sections look too small or repetitive, move to a higher bookmark level.
  • If the PDF has no usable outline, switch to a different method such as page-range splitting or size-based splitting.
  • Compress the output files afterward if you need smaller downloads or easier uploads.

Troubleshooting

  • No bookmarks found: the PDF may not contain a bookmark outline at all. Use a manual split method instead.
  • Sections start on unexpected pages: some bookmarks in the source PDF may point to the same page, use unusual destinations, or have inconsistent structure.
  • Too many tiny sections: switch to a higher bookmark level such as Level 1 so the output follows broader chapters instead of smaller subsections.
  • Not enough sections appear: try a deeper bookmark level if the PDF includes nested outline entries.
  • Split button does nothing: add 1 PDF file first and make sure at least one valid bookmark section is detected or selected.
  • Error on the PDF: the file may be damaged, encrypted, or unusually complex — re-save it in a desktop PDF app and try again.

Frequently asked questions

Related tools

Other utilities that often go together with structured PDFs.