The EPUB file format (short for electronic publication) is an e-book format with the extension .epub. You can download EPUB files and read them on your smartphone, tablet, e-reader, or computer. This freely available e-book standard supports more hardware e-book readers than any other file format.
EPUB files can be opened in most e-book readers, including the B&N Nook, Kobo eReader, and Apple's iBooks app. EPUB files have to be converted before they're usable on the Amazon Kindle. EPUB files can also be opened on a computer with several free programs, such as Calibre, Adobe Digital Editions, iBooks, EPUB File Reader, Stanza Desktop, Okular, and Sumatra PDF. Microsoft Edge, the default browser in Windows 10, features out-of-the-box support for reading EPUB files.
Example ePub readers: A selection of ePub readers here.
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