Open EPUB files

  • Full name
    Open Publication Structure EBook Format
  • Developer
    IDPF
  • Popularity
Have you encountered a problem with a EPUB file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a EPUB file here. In the further part of this page we have added a list of programs that should open your EPUB file. It is enough you choose a proper application for your operating system, download and install it.

What is EPUB file?

With the EPUB file extension digital books are marked in the Open Ebook format. It is an open, XML-based standard for digital and electronic publications. This is developed by the International Digital Publishing Forum (IDPF).

More info

The EPUB format replaces the older standard Open eBook (EOB) and can contain not only the book data but also DRM (Digital Rights Management) mechanisms.

The EPUB format is based on three open standards, all developed and maintained by the IDPF.

Open Publication Structure (OPS), which defines the formatting of the actual content
Open Packaging Format (OPF), which defines the structure (including table of contents)
Open Container Format (OCF), which regulates the packaging of all necessary files to a ZIP archive with EPUB extension
epub files can be viewed with many readers and some readers, for example OYO, Apple iPad or Sony Reader. In addition, there are a variety of conversion programs to convert EPUB into other formats.

Programs which can open a EPUB file

How to open file with EPUB extension?

In order to open a file with EPUB extension one of the following programs must be installed on user’s system. If a problem with opening EPUB file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with EPUB files, follow the instructions below.
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Install Adobe Digital Editions or other program from the list

Most often resolving problems with opening EPUB files is very simple. Just install an appropriate program that supports such files. All of the listed programs support EPUB files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of EPUB files or offer file conversion options, but may not be capable of editing such files.


Set Adobe Digital Editions as the default program for opening EPUB files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate EPUB files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Adobe Digital Editions applications is not on the list, select "Browse" option in order to manually locate the directory where Adobe Digital Editions has been installed.

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Check the section that lists most common problems with EPUB files

Sometimes problems with opening EPUB files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • EPUB files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open EPUB files (should that be the case, please contact your system administrator or IT specialist)
  • EPUB file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)