What is EPUB?

What is EPUB?


EPUB (short for electronic publication; alternatively capitalized as ePubePUBEPub, or epub, with "EPUB" preferred by the vendor) is a free and open e-book standard by the International Digital Publishing Forum (IDPF). Files have the extension .epub.
EPUB is designed for reflowable content, meaning that the text display can be optimized for the particular display device used by the reader of the EPUB-formatted book. The format is meant to function as a single format that publishers and conversion houses can use in-house, as well as for distribution and sale.

Device Reading Systems
The boundary between hardware and software is not clear cut. Some of these devices are dedicated to E-book tasks while others are platforms that include E-book readers or can have them added. See Comparison of e-book readers for details of dedicated devices (not all support EPUB).
  • Android devices
  • Barnes & Noble Nook
  • BeBook
  • Bookeen Cybook Gen3, Cybook Opus
  • COOL-ER
  • Cruz Reader Cruz Tablet
  • Ctaindia's eGriver Ebook Reader
  • eClicto
  • ECTACO jetBook and ECTACO jetBook Lite
  • eSlick
  • Hanlin eReader
  • Hanvon N516, N518, N520, N526
  • iPad, iPhone, and iPod Touch (Lexcycle Stanza, Glider or iBooks on iOS 3.2+)
  • iRex Digital Reader 800, 1000
  • iRiver Story
  • Kobo eReader
  • Linux tablets and PDAs such as Sharp Zaurus and Nokia770, n800, n810, and n900
  • Plastic Logic
  • PocketBook Reader
  • Sony Reader