Split EPUB by Chapters

Split EPUB by Chapters takes one EPUB and turns each chapter you select into its own standalone file. That fits a handful of genuinely practical situations rather than everything at once. Authors and editors use it to pull a single chapter out for revision in a word processor or writing app, so changes stay contained instead of risking the full manuscript. It is also a clean way to hand a beta reader or a prospective buyer one sample chapter without sharing the entire book.

For publishing and e-reader workflows, separating chapters lets you reorder, re-edit, or re-test a problem section in isolation before folding it back into the whole. Students and researchers working through a long reference text can carve out the parts they actually need to annotate. Because the output is a set of valid EPUB files, each piece opens in the same readers as the original and can be archived or passed along independently.

It is not a reformatting or conversion tool, and it does not change the words on the page. Its single job is structural: take the reading order the book already defines and break it into the chapter-sized files you choose.

Drop or select one .epub file. The tool reads it entirely in your browser and lists the chapters it finds, drawn from the table of contents where one exists, or from the book's spine (its reading order) when no usable TOC is present. You then tick the chapters you want using the checkboxes, with All and None shortcuts to move quickly. A split needs at least two selected chapters; once you confirm, each selection is built into its own file and offered as a separate download.

Each exported chapter is a self-contained EPUB. The tool copies that chapter's text plus the book's shared resources, such as stylesheets, images, and fonts, so the chapter still renders with its original styling, and it generates a fresh table of contents and metadata carrying the original title and author. Output files are named after the source book and chapter, for example mybook-part1-introduction.epub.

Everything runs locally: nothing is uploaded, and nothing is retained once you close the tab. The tool will not split a DRM-protected file, it caps very long books at the first 50 table-of-contents entries, and it does not merge, re-paginate, or rewrite content.

The biggest source of confusion is how the source book is structured. "Chapter" here means a reading-order item, not necessarily a heading you see on the page. If an author packed several chapters into one XHTML file, those will export together as a single part; if one chapter was split across multiple files, it may appear as several entries. The chapter titles shown also depend on the book's own table of contents, so a poorly tagged EPUB can produce vague labels like Part 3 instead of real chapter names.

Navigation-only or empty entries, such as a bare title page or section divider, may produce files with little or no readable content, so review the list before selecting everything. Remember the minimum of two selections, and note that books with more than 50 TOC entries will only show the first 50. Selecting a single chapter will not start a split.

Each output is a minimal EPUB built around one chapter rather than a trimmed copy of your original. Cross-chapter internal links, the full book's navigation, and any whole-book metadata beyond title, author, and language are not carried into the individual pieces.

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 file count matches the number of chapters you selected, that the filenames line up with the right sections, and that no part came out empty or truncated where a navigation-only entry slipped into the selection.

If styling matters, glance at headings, lists, and any images to verify the shared stylesheet and assets carried over. For text destined for another writing or publishing tool, paste a sample across to confirm characters and structure survive the move the way you need.

For any official, financial, or legal document, treat the split output as a draft and verify it manually. Compare each exported chapter against the source side by side to confirm nothing was dropped, reordered, or altered before you distribute, file, or act on it.