To fix corrupted JPG files, start by ensuring that your files open up in other applications. It is possible that there might be some incompatibility problem in the photo viewer software despite the fact that the files themselves are not corrupt. Make sure to make backups of your files before attempting any fix. After this, a JPG fixer software could be used to repair the corrupt image data. In case your photos were on an SD card, USB flash drive, or a hard disk, then you should scan the drive for any problems. Make sure not to format the drive nor add any files to it since this will decrease the chance of recovering the photos.