X3F Repair – FREE. The X3F file type is a RAW image photo taken by digital cameras with X3 sensors. The X3F format is popular because the files contain compressed raw data with a preview image and all the information needed to archive top-quality photographs and to render them to output files for different uses. However, .X3F files can easily become corrupted so that RAW .x3F digital photos cannot be accessed. X3F Repair will allow you to quickly open and repair a corrupt or damaged .X3F file.