Question 1

How does Convert PDF to EPUB work?

Accepted Answer

The tool reads your PDF inside the browser using PDF.js, extracts the text and structural cues (headings, paragraphs, page breaks), and writes them into a standard EPUB 3 container. The processing happens entirely in your browser — nothing is uploaded to a server.

Question 2

Are my files uploaded anywhere?

Accepted Answer

No. Convert PDF to EPUB runs entirely in your browser using WebAssembly and JavaScript. Your files never leave your device. You can confirm this by opening DevTools, switching to the Network panel, and watching the conversion run with zero outbound requests.

Question 3

Will the EPUB read well on Kindle and Kobo?

Accepted Answer

Yes for text-heavy PDFs (research papers, novels, reports). The output is reflowable EPUB 3 that adapts to any e-reader screen size. Image-heavy PDFs (textbooks with figures, magazines) convert with mixed results — the images embed but layout fidelity drops, which is intrinsic to the PDF-to-EPUB problem rather than this specific tool.

Question 4

Is there a file size limit?

Accepted Answer

Soft limit of 100 MB per file for browser memory reasons. Larger files may work but can slow down older devices. For very large PDFs, split first using /split and convert each part separately.

Convert PDF to EPUB

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