what is epub file

EPUB is an e-book file format that is short for electronic publication. It is a technical standard published by the International Digital Publishing Forum (IDPF) and became an official standard of the IDPF in September 2007, superseding the older Open eBook (OEB) standard. EPUB is supported by many e-readers, and compatible software is available for most smartphones, tablets, and computers. EPUB files can store words, images, stylesheets, fonts, metadata details, and tables of content. They are considered layout agnostic, meaning that screen size doesnt affect the formatting, and can display content on screens as small as 3.5 inches. EPUB is the most widely supported vendor-independent XML-based e-book format, supported by almost all hardware readers. To open an EPUB file, you can use Calibre or another free program on your desktop, or use the preloaded iBooks or Google Play apps on your iPhone or Android device.