.EPUB File Extension

Electronic Publication

EPUB files use the .epub extension. EPUB stands for electronic publication. EPUB files are e-book files based on open standards. Therefore EPUBs are layout agnostic - formatting isn’t affected by sc...

General Information

Title EPUB File Extension
Extension .epub
Full Form Electronic Publication
File Type eBook File
Developer International Digital Publishing Forum (IDPF)
MIME Type application/epub+zip

File Function

Primary Function eBook reading
Additional Functions Digital publishing
Features Reflowable, Rich format

File Characteristics

Quality High readability
Supports Layers N/A
Supports Transparency N/A
Editable Yes, with tools

Use Cases

eBook Distribution Yes
Digital Libraries Yes
Self-publishing Yes

Security and Practices

Security Risks Embedded scripts
Best Practices Validation, Encryption

Historical/Version Information

Initial Release September 2007
Latest Version EPUB 3.2 (2019)

Associated Types

Similar Extensions .mobi, .pdf, .txt

Software Compatibility

Software Usage Policy OS Compatibility
Adobe Digital Editions Free Windows, Mac
Calibre Free Windows, Mac, Linux
Apple Books Pre-installed iOS, Mac