PDFExplode can split your large PDF into many PDFs. This app is unique in that it can extract pages corresponding to any Table of Contents (TOC) entry in your PDF. For example, extract PDF of any or each chapter in a long PDF text or manual.
Many professionally-produced PDFs contain a detailed table of contents. Using PDFExplode, you can extract out any section into its own PDF. Further, PDFExplode will preserve any sub-table of contents within the exported section.
Easy 3 Steps to Select, Mark, and Export
You can also rename the selected TOC entries prior to export. For example, you may want to add a "Chapter" prefix or remove any unwanted characters. These TOC edits do not modify the original PDF.