Notes about the EPUB file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The EPUB file type is primarily associated with 'Open Publication Structure' by International Digital Publishing Forum (IDPF). .EPUB is the file extension which refers to two open standards, the Open Publication Structure (OPS) and Open Container Format (OCF), produced by the IDPF. .EPUB allows publishers to produce and send a single file through distribution and offers consumers interoperability between software/hardware for unencrypted reflowable digital books. OEB, originally produced in 1999, is the precursor to OPS. .EPUB files are a ZIP file with XML/HTML eBook content along with a XML file describing the contents. You can use the Adobe Digital Editions program to read these files.
Detailed information for file extension EPUB:
File classification: Archive
Mime type: application/zipIdentifying characters
Hex: 50 4B 03 04 , ASCII: PK
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.