The EPUB (or Electronic Publication) is the free and open format standard in the ebook industry. This standard is maintained by the International Digital Publishing Forum (IDPF), a non-profit organization of the world's largest publishers and technology enterprises, of which Flipside is a member.

The EPUB format runs on most e-Readers and devices except the Amazon Kindle e-ink readers. Currently, there are two popular versions: EPUB 2.2 and EPUB 3.



  • Flexible: reflowable or fixed layout, print edition layout capable
  • Enhanced: embedded media content (video, audio, large-scale PDF)
  • Interactive: dynamic features (drag-and-drop, rotate, reader- triggered animation)
  • Read-along feature


  • Limited reader/device support (currently runs on a number of reader apps like iBooks and Kobo)


  • DRM-capable via Adobe Content Server
  • iBooks' Fairplay DRM for Apple

Best for books like…

  • Children's books
  • Comic books
  • Magazines
  • Text books
  • Trade books
  • Trade books with complex layouts (cookbooks, map books)


  • Any Apple device with iBooks and compatible apps
  • Kobo Vox