Outline-Native Precision
Splits at outline entry coordinates - the most precise split points in any PDF.
Split PDF by PDF Outline
Navigate your document's structure with the PDF outline, then divide it - one file per outline entry, with zero manual configuration.
Using the PDF Outline as a Splitting Guide
The PDF outline is the most reliable guide to a document's internal structure - more precise than page numbers and more machine-readable than visible headings.
By following the outline when splitting, iMZi PDF produces files that respect the document's own definition of where each section begins and ends.
This is especially valuable for long, complex PDFs where visual cues like heading styles may be inconsistent but the outline structure remains authoritative.
Steps to Split a PDF by Its Outline
The PDF outline drives the entire split process automatically.
1. Upload an Outlined PDF
Drag your PDF to iMZi PDF. The outline tree is parsed and displayed immediately.
2. Select Outline Depth
Choose whether to split at the top level only or include deeper outline levels.
3. Generate and Download
Click Split PDF. One file is created per outline entry at your selected depth, all downloadable as a ZIP.
Accurate, Outline-Driven Document Division
Split the way the document was designed to be split.
Depth Selection
Choose your preferred outline level to control granularity of the split.
Outline Entry Filenames
Every file is named from its outline entry title for instant identifiability.
Handles Complex Hierarchies
Processes multi-level outline trees in complex documents without errors.
Zero Configuration Needed
The outline itself provides all the information needed - no settings to adjust.
Free to Use
No payment required to split any PDF by its outline.
Why Outline-Based Splitting Is Better Than Manual Page Selection
Selecting page ranges manually is error-prone: miscounting one page means a section starts or ends in the wrong place. Outline-based splitting has no such risk - every split point is read directly from the PDF's internal coordinates.
Ideal Use Cases for PDF Outline-Based Splitting
These scenarios show when outline-based division adds the most value.
Dividing formal technical specifications
Splitting academic dissertations by chapter
Extracting sub-sections from reference manuals
Breaking apart structured compliance frameworks
Distributing outline-level sections of a proposal
Archiving outline-defined document regions
Frequently Asked Questions
Find answers to common questions about this tool.
Let the PDF Outline Define Every Split Point
Precise, outline-driven splitting - no page counting, no guessing, no errors.