AI PDF to EPUB converter

Epubfy uses AI where it helps — recognizing the chapters and headings of your PDF — and never lets it touch the text. You get a well-structured EPUB with every word exactly as in the original.

Your PDF is deleted right after conversion. No sign-up, no email.

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Free · no sign-up · text-based PDFs up to 30 MB and 600 pages

What the AI does

The hardest part of turning a PDF into an ebook is knowing what each piece of text is. A PDF only stores positions and fonts: it doesn't know that one line is a chapter title, another a section heading and another a running header. Rules based on font size alone often guess wrong — a large pull quote becomes a chapter, or numbered sections are missed.

So Epubfy asks an AI model to look at the layout the way a person would. It sees a summary of the fonts used in the document and sample lines from a range of pages, and decides things like:

  • "Chapter titles are the 20 pt lines starting with Chapter and a number."
  • "Sections are the 14 pt bold lines numbered 1.1, 1.2…"
  • "The book's title and author are …"

What the AI doesn't do

The AI never writes text into your book. It returns a short structure plan, and the conversion program does the rest:

  1. Checks the plan against every page of the document. Rules that match nothing, or match ordinary paragraphs, are sent back to the AI to fix, and dropped if they still don't fit.
  2. Copies the text word for word into paragraphs, rejoining words hyphenated at line ends and leaving out page headers, footers and page numbers.
  3. Builds the EPUB, with a table of contents from the detected chapters and sections.

This is deliberately different from tools that feed a whole document through a language model to "rewrite" it as an ebook. That approach can quietly change sentences, drop paragraphs or invent text — a serious problem for a book, a contract or study material.

AI or basic mode?

Every conversion uses AI first. If the result's chapters look wrong, switch to basic mode on the result screen: it treats larger text as headings, with no AI involved. Both modes produce the same text; only the chapter structure differs. You can check either one instantly with Read in browser.

What works best

  • Books and textbooks with clear chapter and section headings get the biggest benefit.
  • Reports, manuals and papers with numbered sections are handled well, including two- and three-column pages.
  • Scanned PDFs aren't supported yet, and very visual layouts (comics, magazines, slides) are better kept as PDF.

Curious about the details of good conversions? See converting PDF to EPUB without losing formatting.

Frequently asked questions

Does the AI rewrite or summarize my book?

No. The AI only decides the structure — which styles are chapter and section headings. Every word in the EPUB is copied from the PDF by the program, so nothing is reworded, shortened or invented.

Why not let an AI model rewrite the whole PDF as an ebook?

Language models can silently change words, skip passages or make things up, and long books cost a lot to process that way. Using AI only for the structure and copying the text exactly gives you the original book, reliably.

What does the AI see?

A sample of lines from some pages, with their font sizes and styles — not the whole document. It sends back a short description of the heading structure. Details are in our privacy policy.

What if the AI gets the chapters wrong?

Every plan is tested against the whole document and corrected or trimmed if it doesn't fit. If the chapters still look wrong, switch to basic mode on the result screen: it finds headings by font size alone. The text is identical in both modes.

Can the AI read scanned PDFs?

Not yet. Scanned PDFs are page images with no text inside; reading them needs OCR, which Epubfy doesn't do yet.

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