Open Packaging Format
File type: E-book file
Files with opf extension are ebooks saved in the XML-based, Open Packaging Format.
Found 5 different file type records with the same opf filename suffix.
File type category:
E-book file
Date updated: January 3, 2025
File extension opf is related to Open packaging Format. OPF is an XML-based e-book format created by E-Book Systems.
Open Packaging Format (OPF) is one third of a triumvirate of modular specifications that make up the EPUB publication format.
EPUB enables the creation and transport of reflowable digital books and other types of content as single-file digital publications that are interoperable between disparate EPUB-compliant reading devices and applications.
EPUB encompasses a content markup standard (Open Publication Structure – OPS), a container standard (Open Container Format – OCF), and OPF packaging standard.
Okular e-book viewer should be able to view .opf files.
Calibre is able to export .opf files to other formats.
Mobipocket eBook Creator (Microsoft Windows)
Adobe Digital Editions (Microsoft Windows)
Adobe InDesign (Microsoft Windows)
Adobe InDesign for Mac (Apple macOS / Mac OS X)
Okular (Linux/Unix)
Adobe Digital Editions (Multiplatform)
Mobipocket eBook Creator (Microsoft Windows)
Mobipocket eBook Creator (Microsoft Windows)
Calibre (Microsoft Windows)
OpenBerg Lector (Microsoft Windows)
Calibre for Mac (Apple macOS / Mac OS X)
Calibre for Linux (Linux/Unix)
Mobipocket eBook Creator (Microsoft Windows)
TI-Reader Converter (Microsoft Windows)
Mobipocket eBook Creator (Microsoft Windows)
File type category:
Various data file
Date updated: August 16, 2018
The opf file extension is related to FlipAlbum, a software program for organizing and sharing of digital photos, by E-book Systems.
The opf file contains album saved in the program.
You can work with these OPF albums in FlipAlbum program.
Probably cannot be converted to other formats.
FlipAlbum (Microsoft Windows)
File type category:
Configuration file
Date updated: April 3, 2019
The opf file extension is also associated with the KEPServerEX, a tool for connecting, managing, monitoring, and controlling diverse automation devices and applications.
This type of .opf file stores configuration of KEPServerEX project.
When placed in proper folder, this files will be loaded with the project.
Configuration files are usually not meant to be converted to anything.
KEPServerEX (Multiplatform)
File type category:
Various data file
Date updated: July 30, 2019
The opf file extension is also used for projects files in the Obsidium program.
Obsidium is software protection and licensing system. These files are meant to save work in progress.
You can open and continue to work with these projects in Obsidium.
Probably can be exported to other formats.
Obsidium (Microsoft Windows)
Obsidium (Microsoft Windows)
Obsidium (Microsoft Windows)
Obsidium (Microsoft Windows)
Obsidium (Microsoft Windows)
File type category:
Various data file
Date updated: July 22, 2019
The opf file extension is associated with the VisualOMP, a software developed by DNA Software, Inc.
The opf file contains project created VisualOMP.
The VisualOMP seems to be obsolete product without any support from the developer.
Use VisualOMP to work with *.opf files.
Probably can be exported to other formats.
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