E-book Converter
EPUB is essentially a website in a box: XHTML and CSS zipped together. Because the content reflows, the reader chooses the font size and the text re-wraps, which is why e-books adapt to any screen.
Converting to PDF fixes the layout into pages; converting a PDF to EPUB does the reverse, re-flowing fixed pages into continuous text. Both directions involve a genuine change in how the content is organised.
Most used e-book converters
All e-book conversions
7 supported conversions. Every one is a working converter, not a placeholder.
E-book formats explained
Electronic Publication
.epub
The open reflowable e-book standard.
Best for: E-readers · Reflowable text · Apple Books and Kobo
Mobipocket E-book
.mobi, .prc
Amazon's legacy Kindle format.
Best for: Older Kindle devices
Kindle Format 8
.azw3, .azw, .kfx
Amazon's Kindle format, usually DRM-protected.
Best for: Kindle devices and apps
Your e-books are not uploaded to a server
Most online converters copy your file onto their own computer, convert it there and send it back — that copy is what “upload” means, and it is the part nobody explains. Nothing here does that. An e-book file is often tied to the account that bought it, and a manuscript is often not published yet. Every tool on this page runs inside the browser you are reading this in, so the file is never transmitted, never stored and never seen by anyone. Turn off your Wi-Fi and convert something anyway if you want to watch that be true.
What people actually convert here
Purchased books
many carry a watermark identifying the buyer — you
Unpublished manuscripts
work whose value depends on it not leaking
Review and proof copies
sent under embargo, with your name in them
Course and training material
licensed content you may not redistribute
Reflowable and fixed layout
A reflowable book has no inherent pages — what looks like page 40 on your phone is page 25 on a tablet. That is a feature, and it is why EPUB works across devices.
PDF is the opposite: pages are fixed, which suits printing and citation but makes reading on a small screen awkward. Choosing between them is really a question of whether the reader needs a fixed reference or comfortable reading.
DRM and why some books cannot be converted
Books bought from Amazon, Apple or most retailers carry digital rights management that encrypts the content. No conversion is possible while that encryption is in place.
FileTools360 does not remove DRM and will not attempt to. Books you own without DRM — from Project Gutenberg, Standard Ebooks, or a publisher that sells unencumbered files — convert normally.
FAQ