Step-by-step instructions
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Use Calibre (best free tool)
Download and install Calibre (calibre-ebook.com — free, open-source). Click Add books and select your PDF. Select the book in the library, click Convert books → Convert individually. Set Output format to EPUB. Under Page Setup, choose your target device profile. Click OK. Calibre processes the PDF and saves an EPUB to your Calibre library folder.
Go to converter - 2
Improve conversion quality in Calibre
In the Calibre conversion dialog, go to Look & Feel to set font size and margins. Go to Structure Detection — if the PDF has chapters, Calibre can detect them for navigation. Under Table of Contents, set the TOC depth. If lines break in odd places, open Heuristic processing and tick Enable heuristic processing and Remove unnecessary hyphens. Calibre's own manual says multi-column PDFs are not supported, so single-column PDFs convert best.
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Alternative: online converter for simple PDFs
Online converters such as CloudConvert handle simple PDF-to-EPUB conversion without installing software: upload the PDF, choose EPUB and download. FormatDrop's PDF to EPUB converter does the same in your browser, so the PDF is not uploaded. It keeps the text in reading order, the photos and the chapter titles. It also builds a table of contents from the PDF's bookmarks or its larger title text. Every online tool struggles with complex layouts, tables and pictures.
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Transfer to your e-reader
Calibre can send EPUB directly to connected e-readers. For Kobo — copy to the Kobo drive's root or eBooks folder. For Apple Books — double-click the EPUB or drag into Books on Mac. For Kindle — Kindle devices don't support EPUB natively; convert to MOBI or AZW3 in Calibre first, or use Amazon's Send to Kindle service which accepts EPUB since 2022.
Why convert PDF to EPUB?
PDF is designed for printing — fixed layouts that look identical on every printer. EPUB is designed for reading — text reflows to fit your screen, font size, and line spacing preferences. Converting PDF documents and books to EPUB makes them far more comfortable to read on e-readers.
Your files never leave your device
FormatDrop runs the conversion engine entirely inside your browser using WebAssembly. No file upload. No server. Nothing stored. You can verify this by opening DevTools → Network tab and watching: zero upload requests.
Frequently asked questions
Why does my PDF look bad after converting to EPUB?
Can I convert a scanned PDF to EPUB?
Can Kindle read EPUB files?
No account. No upload. Works in any browser.