.epub May 2026
While both formats are used for e-books, they serve very different purposes.
EPUB (Electronic Publication) is the world's most popular open standard for digital books. Unlike fixed-layout documents like PDFs, EPUB files are "reflowable," meaning the text adjusts automatically to fit the screen of your smartphone, tablet, or e-reader. 📖 What is an .epub File? While both formats are used for e-books, they
: The actual text of the book, written in the same language as websites. 📖 What is an
: Essential information like the book's title, author, and language. : Instructions that tell the reader how the
: Instructions that tell the reader how the text should look (font, spacing, margins). Images & SVGs : Cover art and interior illustrations.
Technically, an EPUB file is a specialized containing a collection of web-based files. It is developed and maintained by the World Wide Web Consortium (W3C) to ensure that digital books work across almost every device. Key Components of an EPUB: