Melvin Nava - 2021-08-05

You can change JFIF (JPEG File Interchange Format) file extensions to .JPG safely.

If you still want JPEGView to read .JFIF files from the directory you can try to add the file extension to the "FilesProcessedByWIC" option found in the "JPEGView.ini" config file.

Something like this:

FilesProcessedByWIC=*.wdp;*.hdp;*.jxr;*.jfif

Please note that changing the file extensions to JPEG might be preferable. JPEGView uses by default an integrated Turbo JPEG library to open jpeg files, which is a little faster than WIC.