FileHint

.epub

Low risk

Electronic Publication

The IDPF / W3C standard for e-books. Under the hood it is XHTML + CSS + metadata inside a ZIP — designed for reflowable text.

MIME types

  • application/epub+zip

Category

document

What opens this file

  • Apple Books
  • Calibre
  • Thorium Reader
  • Kindle Previewer
  • Adobe Digital Editions

How to open by OS

Windows

  • Calibre, Thorium Reader, Edge (built-in reader).

Mac

  • Apple Books, Calibre, Thorium.

Linux

  • Calibre, Foliate.

Ios

  • Books, Kybook.

Android

  • Google Play Books, Moon+ Reader.

Safety notes

  • Readers that permit JavaScript inside EPUBs open XSS-class risks. Pick readers that disable it by default.

Common mistakes

  • Fixed-layout EPUBs struggle on smaller devices — ship reflowable content when you can.
  • DRM-protected .acsm files are only readable through Adobe Digital Editions.

Related extensions

References