What is the difference between .g4 and .epub?
- Extension
 - .g4
 - .epub
 
- Format
 - Binary
 - Binary
 
- Category
 - Fax
 - Ebook
 
- Developer
 - Computer Fax Systems (CFS)
 - IDPF
 
- Description
 - Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.
 - An EPUB file is a digital ebook saved in the EPUB format, an open XML-based format for digital books and publications. It provides a standard digital publication format for publishers and consumers. EPUB files can be viewed with supporting software programs and hardware devices, such as the Sony Reader and Barnes & Noble Nook.
 
- MIME Type
 - image/g4fax
 - application/epub+zip
 
- Sample
 - sample.epub
 
- Wikipedia
 - .epub on Wikipedia