No Manual Input
Bookmarks serve as automatic dividers - no page numbers to enter.
Split PDF Using Bookmarks as Natural Dividers
Your PDF already knows where each section starts - iMZi PDF uses that built-in structure to split it perfectly.
Using the Built-In Bookmark Structure as a Splitter
Every well-formed PDF contains an invisible outline that powers the navigation panel in your PDF reader.
Rather than requiring you to recreate that structure manually, iMZi PDF reads it directly from your file and uses each bookmark entry as a natural divider - splitting the document into one file per section without any input from you.
Think of it as letting the document split itself. You define the structure once when you create the PDF; iMZi PDF honors that structure when you need to divide it.
How to Use Bookmarks to Split a PDF
Leverage your existing bookmark structure with no extra configuration.
1. Open iMZi PDF Bookmark Splitter
Go to the Split PDF by Bookmarks tool. No login or setup required.
2. Upload Your Bookmarked PDF
The tool reads and lists all bookmarks found in the file automatically.
3. Split and Download
Click Split PDF. Download the resulting files, each representing one bookmarked section.
Advantages of Using Bookmarks as Split Dividers
Work smarter by leveraging structure that already exists in your document.
Respects Document Intent
The split follows the structure the author designed into the PDF.
Filter Specific Sections
Split only bookmarks matching a keyword rather than every single one.
Multi-Level Support
Works with flat and deeply nested bookmark trees alike.
Secure Upload
HTTPS-encrypted transfer and automatic file deletion protect your content.
Free Forever
No subscription needed to use the core bookmark splitting feature.
Your PDF Already Has a Map - Use It
Every bookmark in a PDF is a precise coordinate pointing to a specific page. iMZi PDF treats those coordinates as the dividing lines and produces perfectly bounded output files, every time.
Best PDFs to Split Using Their Own Bookmarks
Any PDF created with an intentional structure yields excellent results.
eBooks with chapter bookmarks
Government reports by department
Instruction manuals by procedure
Financial statements by quarter
Compliance documents by regulation
Portfolios by project
Frequently Asked Questions
Find answers to common questions about this tool.
Let Your PDF's Own Structure Do the Work
Use bookmarks as dividers to split any structured PDF in seconds.