Opening 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 OPF files.
What is an OPF file?
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.
Software that will open, convert or fix OPF files
Try a universal file viewer
In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.