Convert EPUB e-books to Markdown
Turns an EPUB into a single Markdown document with its chapter structure intact — for quoting, note-taking, or handing a whole book to a language model. Everything runs inside your browser, so the book is never uploaded.
When this helps
An EPUB cannot be attached, and copying it chapter by chapter takes an afternoon
Get the whole text as Markdown, then ask for a summary, an index, or questions about what the book argues
Typing out the passage you want to quote is slow and introduces typos
Search the converted text and copy the paragraph exactly
EPUB contents cannot be searched alongside your other material
Convert and keep the Markdown with your notes, where full-text search reaches it
The manuscript is gone and only the published EPUB remains
Recover the text with its chapter structure as the basis for a revision
FAQ
- Is my file uploaded to your server?
- No. If your browser supports WebAssembly (WASM, a technology for running software inside the browser safely and quickly), the conversion happens entirely on your device — a book you bought is never sent anywhere. The 2.2MB engine loads on the first run only.
- Does it work on DRM-protected books?
- No. Most e-books bought from a store are protected by DRM, and this tool does not remove it. It works on DRM-free EPUBs — self-published books, Project Gutenberg, technical publishers who sell without DRM, and books you made yourself.
- Is the chapter structure preserved?
- Yes. Chapter headings come out as Markdown headings, so the shape of the book survives even in a single file. Paragraphs, emphasis, links and tables are kept as well.
- Can it handle a whole novel?
- Yes. Full-length novels of over 300,000 characters convert in testing. The result is shown on the page in full, so Ctrl+A (⌘+A on macOS) selects all of it at once for copying.
- What happens to the cover and illustrations?
- They are not included. The conversion runs inside your browser, so there is nowhere to put them.
- Which other formats does this page accept?
- .docx, .xlsx and .pptx, .doc, .xls and .ppt, OpenDocument (.odt, .ods, .odp), .rtf, .csv and .pdf.
- What is the file size limit?
- 20MB per file.
Related tools
- PDF to Markdown — When the book or paper is a PDF
- Word (.docx) to Markdown — When the manuscript is a Word file
- Legacy Word (.doc) to Markdown — For Word 97-2003 documents
- Character encoding detection — When a plain text file's encoding is unknown