What is EPUB file format?

EPUB stands for Electronic Publication and it is the most popular file format for storing digital books.

EPUB is the most popular and open standard format that can adapt to different screen sizes and devices. You can open EPUB files with various programs and apps such as Calibre, Apple Books, Google Play Books, or EPUBReader.

EPUB files can contain text, images, stylesheets, fonts, metadata, and multimedia elements.