It's also worth mentioning that batch operations are supported so you can use the program to repair multiple JPG files at the same time as long as they are compatible with the reference file.

The application will automatically detect the sample file in the selected folder and extract the data it needs which will allow it to merge the headers of the sample and the original file in order to fix the corrupt file. The reference image needs to be renamed to sample.jpg and located in the same folder as the file that needs to be fixed. This file needs to be another JPEG taken with the same camera, and with the same orientation and resolution as the file you're trying to repair. In order to fix the errors, JPGRepair requires a reference file. In the main window, you can explore a tree-based folder structure to select the corrupt image you want to fix. JPGRepair is a practical piece of software designed to repair invalid JPEG markers as well as corrupt JPEG headers using a reference or sample file. There are various causes that may lead to corrupt JPG files and invalid markers or headers is a frequent problem. Deal with corrupt JPEG headers and markers easily

Jpeg repair toolkit