Format guide
EPUB
Electronic Publication
EPUB is the open-standard ebook format used by every major reader except Kindle. Files are zips containing reflowable HTML, CSS, and metadata, text adapts to any screen size. EPUB 3 added audio, video, and interactive elements but most ebooks still ship as EPUB 2 for compatibility.
How to open a EPUB file
Apple Books, Calibre, Adobe Digital Editions, Google Play Books, Kobo readers, Nook, most e-readers except Kindle.
Primary use
Ebooks across non-Kindle readers.
Convert EPUB to other formats
Looking for something else? Browse the full list of 192 converters.