Files with the EPUB extension contain electronic publications - Electronic PUBlication, compressed with ZIP compression method, stored in an open format based on XML. Within the file, there is also some metadata on a given publication. It also enables to search through the text for specifics.
Such format may include:
EPUB files have substituted the previous Open eBook format, introduced by the International Digital Publishing Forum – IDPF, in the year 2007. Currently, along with the MOBI and PDF formats, EPUB is the most popular format used for distributing electronic books or other publications for reading devices, although they can be opened also on mobile devices and computers equipped with proper software. In the EPUB 3.1 version, also audio and video data can be stored and it supports interactivity.
Below you will find an index of software programs that can be used to open EPUB files divided into 7 categories according to system platform supported. Files with EPUB suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.
Problems with accessing EPUB may be due to various reasons. Fortunately, most common problems with EPUB files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.
The main and most frequent cause precluding users form opening EPUB files is that no program that can handle EPUB files is installed on user’s system. The most obvious solution is to download and install Sony Reader or one to the listed programs: Calibre, OverDrive Media Console Phone, Stanzetta. Above you will find a complete listing of programs that support EPUB files, classified according to system platforms for which they are available. If you want to download Sony Reader installer in the most secured manner, we suggest you visit website and download from their official repositories.
You still cannot access EPUB files although Sony Reader is installed on your system? Make sure that the software is up to date. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. The reason that Sony Reader cannot handle files with EPUB may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Sony Reader.
If you have the latest version of Sony Reader installed and the problem persists, select it as the default program to be used to manage EPUB on your device. The method is quite simple and varies little across operating systems.
Change the default application in Windows
Change the default application in Mac OS
You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper EPUB file. Being unable to access the file can be related to various issues.
If the file is infected, the malware that resides in the EPUB file hinders attempts to open it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. If the EPUB file is indeed infected follow the instructions below.
Did you receive the EPUB file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. If the EPUB file has been downloaded from the internet only partially, try to redownload it.
Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the Open EBook Format file again.
If the system is under havy load, it may not be able to handle the program that you use to open files with EPUB extension. In this case close the other applications.
Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Open EBook Format files. It is possible that one of the available system or driver updates may solve the problems with EPUB files affecting older versions of given software.
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