OPF File – What is .opf file and how to open it?

OPF File Format

OPF (Open Package Format) is a file extension denoting a FlipViewer FlipBook File developed by E-Book Systems. The OPF file serves as a manifest used in packaging Open eBook Publications (OEBs) and is compliant with the Open eBook Publication Structure specification. It provides metadata and structural information about the eBook’s components, including text, images, and multimedia resources.

Role in Open eBook Publications

Within an OEB, the OPF file plays a crucial role in organizing and referencing the publication’s content. It contains an XML document that specifies the various sections and subsections of the eBook, along with their corresponding file names and types. The file also includes metadata such as the book’s title, author, publisher, and copyright information. By utilizing OPF files, eBook readers can effectively navigate and display the content of an OEB in a structured and user-friendly manner. Additionally, OPF files enable cross-referencing and linking within the eBook, enhancing its usability and interactive experience.

Opening OPF Files with FlipViewer

OPF (Open Packaging Format) files are used by FlipViewer, a digital publishing software, to create interactive flipbooks. To open an OPF file with FlipViewer, follow these steps:

1. Install FlipViewer software on your computer.
2. Launch FlipViewer.
3. Click on “File” and select “Open.”
4. Navigate to the location of the OPF file and select it.
5. Click on “Open.” The OPF file will be opened in FlipViewer, and you can view and interact with the flipbook.

Alternative Methods of Opening OPF Files

If you don’t have FlipViewer installed, you can try opening OPF files using other methods:

• Text Editor: OPF files are XML files, so you can open them using a text editor such as Notepad, TextEdit, or Sublime Text. This will allow you to view the content of the file but not the interactive features.
• Online OPF Viewer: There are online OPF viewers available that allow you to view the content of OPF files without installing any software. However, these viewers may not support all features of the file.

FlipViewer FlipBook File (OPF)

The OPF file extension is associated with FlipViewer FlipBook, a software application developed by E-Book Systems for creating interactive digital flipbooks. OPF files serve as the primary document format for FlipViewer, containing the structure and layout of the flipbook, including page order, images, and text content.

OPF files utilize XML (Extensible Markup Language) to describe the flipbook’s structure. They define the sequence of pages, linking them through a table of contents or thumbnail gallery. Additionally, OPF files specify the appearance of each page, including background colors, fonts, and image placement. They also support the incorporation of interactive elements such as hyperlinks, videos, and sound files, enhancing the user’s engagement with the digital publication.

Other Extensions