Split EPUB by Chapters

Split EPUB by Chapters takes one EPUB and turns each chapter or part you select into its own EPUB. That fits a handful of practical situations. Authors and editors use it to hand a beta reader or a prospective buyer one sample chapter without sharing the entire book, or to review a single part in isolation. Readers use it to break an omnibus or anthology back into its separate books.

For publishing and e-reader workflows, separating parts lets you re-test a problem section on its own before folding the fix back into the whole. Students and researchers working through a long reference text can carve out the parts they actually need. Because each output is a complete EPUB, each piece opens in the same readers as the original and can be archived or passed along independently.

It does not change the words; it only turns the chapters the table of contents defines into separate books.

Drop or select one .epub file. The tool reads it in your browser and lists the parts it will cut, with the number of pages in each. Parts follow the table of contents: the book is cut at each top-level entry, or at the next level down when the top level is a single entry wrapping everything, and pages before the first entry (cover, title page) go with part 1. A book with no usable table of contents is listed as one section per content file. Tick the parts you want, with All and None shortcuts, then create them.

Each part is a complete EPUB 3 book. Its pages keep their original paths, so links inside the part still work; it carries the book's author, language, publisher, rights and cover; it gets its own table of contents listing the entries in that part; and it includes only the images, fonts, audio and video its pages use, including files its stylesheets load. The title becomes the book title plus the part number and name, and files are named like mybook-part1-introduction.epub. With more than one part, a ZIP of all of them is offered too.

Everything runs locally: nothing is uploaded, and nothing is kept once you close the tab. The tool will not split a DRM-protected file, and it does not merge, re-paginate, or rewrite content.

The biggest source of confusion is how the source book is structured. Parts follow the table of contents, not the headings you see on the page: if the contents list only top-level parts, you get parts, not chapters, and a poorly built table of contents can produce odd cuts or vague labels. Check the list and the page counts before creating files.

Links between parts break. A footnote in part 2 that points to endnotes in part 5, or a cross-reference to another chapter, will not work in the split files, because each part contains only its own pages.

Each part carries the whole book's cover and the styles its pages use, so even a small part has some weight, and a part made of a single divider or blank page will open with little to read.

Open at least one or two of the exported files in your normal e-reader and confirm the chapter you expected is the chapter inside, with its text complete and its formatting intact. Check that the number of files matches the number of parts you selected, that the filenames line up with the right sections, and that no part came out empty.

If styling matters, glance at headings, lists, and any images to verify the stylesheets and images carried over. For a sample chapter going to a reader or buyer, open it on the kind of device they will use.

For official documents, compare each part with the source to confirm nothing was dropped.