How to open OPF files

Did your computer fail to open an OPF file? We explain what OPF files are and recommend software that we know can open or convert your files.

What is an OPF file?

We know of 4 different uses of the OPF file type, one of them being Obsidium Project File. Read the details below.

The OPF file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So an OPF opener may not be able to open all kinds of OPF files. In this case, look through all formats to make sure you find the best suited OPF viewer.

Obsidium Project File

Through our analysis of OPF files, we know that one use of the format is Obsidium Project File. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

OEB Package Format eBook

Through our analysis of OPF files, we know that one use of the format is OEB Package Format eBook. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

OmniPass encrypted

Through our analysis of OPF files, we know that one use of the format is OmniPass encrypted. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

Open Packaging Format E-book Data

OPF stands for Open Packaging Format. The Open Packaging Format is a standard that is a part of the EPUB eBook specification. The OPF files store information for an associated eBook, including the title of the eBook, the eBook language, creator, reading order, and book ID. The OPF file is included in the EPUB archive to specify the metadata of the associated eBook. The OPF files are saved in XML format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

OPF file openers, viewers, etc.

These apps are known to open certain types of OPF files. Remember, different programs may use OPF files for different purposes, so you may need to try out a few of them to be able to open your specific file.

FlipViewerFlipViewerUser submitted
Mobipocket CreatorMobipocket CreatorUser submitted
E-book viewerE-book viewerUser submitted
KEPServerExKEPServerExUser submitted
FlipAlbum ProFlipAlbum ProUser submitted
Adobe PhotoshopAdobe PhotoshopUser submitted
FlipAlbumFlipAlbumUser submitted
calibre - E-book managementcalibre - E-book managementUser submitted
Book Wizard ReaderBook Wizard ReaderUser submitted
SIMATIC NET SoftwareSIMATIC NET SoftwareUser submitted
We have not verified any programs that we know for certain can work with OPF-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with OPF-files. If you know one, please use the Suggest link below and tell us about it!