Ebook File Types

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When you purchase our ebook creation service, you will get files that are compatible with every e-reading device, across every reseller platform. Didn’t know you would need multiple ebook files? Here’s a description of the files you’ll receive, and why we create each type:


MOBI is the file type recognized by the Amazon Kindle e-reader. It is also used for the various Kindle apps, such as Kindle for PC, Kindle for Mac, and Kindle for iPad.


An EPUB file, sometimes referred to as the “universal” ebook format, is recognized by most of the other major e-reading devices such as the iPad, Nook, and Sony Reader. It’s also recognized by many software e-readers such as Adobe Digital Editions, which allow people to read ebooks on laptops or computers, rather than purchasing a dedicated device. We will even optimize files specifically for the iPad and the Nook, ensuring your text looks perfect for every reader.

Why can’t I use a PDF?

PDFs can be transferred to an e-reader, but it’s important to note that they cannot be sold through ebook stores like Amazon or iBookstore. Because they do not have the same functionality as MOBI or EPUB files, PDFs are not considered a “true” ebook.

When your book is converted into ebook format by our sister company Publish Green, they convert the original file type—whether PDF, Word, or InDesign—and create both MOBI and EPUB files. This allows your book—now an ebook—to be accessible on all major e-reading devices.

What all ebook formats have in common

It's important to note that, even if an ebook is converted and formatted into a “true” ebook, it is never going to look the same on all e-reading devices.

An ebook is built using a “liquid” layout. This means that the person reading the book can adjust the font size and style according to his or her reading preferences. The font can be increased or decreased in size, and the reader can even select whether to read the text in Times New Roman or Helvetica (just to name a couple of different fonts).

This is part of the ebook experience that readers have come to love—ebooks really allow each reader to personalize the reading experience.

Have questions? Not sure where to start? Give us a call!