EPUB Splitter

The EPUB Splitter processes a single EPUB and divides it into modular outputs based on chapters, sections, or user-defined ranges. It leverages EPUB 2/3 structures (OPF, manifest, spine, TOC) to identify boundaries, preserving metadata and assets. Outputs can be individual EPUB files or a ZIP package containing all parts. The tool is designed for editors distributing chapter packs, educators building reading sets, and publishers delivering modular assets to CMS pipelines. It ensures navigational integrity by updating spine references and manifest entries for each split.

Conceptually, the tool treats the source as a structured container, detects logical boundaries, and reconstructs valid EPUB packages that remain faithful to the original content. It handles embedded fonts and images where possible and maintains internal links to chapters and sections. The approach supports both strict TOC-driven splits and heuristic-based splits when a TOC is absent.

Unique value lies in deep EPUB compatibility, preservation of metadata, and the ability to produce clean, standalone outputs that fit into automated workflows. Typical use cases include exam authors extracting chapters for tests, publishers creating excerpted samples, and LMS admins provisioning chapter-level assets for courses. Core features include input validation, boundary detection, multiple output modes, and robust error handling.