I found it often just produced a small 8K stub of a file that obviously was not a valid JPG.Ī simple 'fix' where the tail end JPEG data is truncated or overwritten with other non-JPEG data could be to add a crop tool to crop off the grey'd out padding and losslessly generate a JPEG out of the selected data area and include the original Exif if not completely replacing a corrupted header. I could not discern what makes it active and what makes the pane inactive so did not try every conceivable patch option or feature as I would have done normally. I did find it difficult to try different options in the patch tool pane as it too often became inaccessible or unresponsive to mouse pointer activity for no apparent reason. I completely understand that you cannot tell without examining the images and neither can I as there is no observable difference in character composition when viewing the possibly truncated images in a hex editor. Joep, My apologies for not composing easily readable text for non native English speakers I am Dyslexic and have a significant short term memory deficit due to oxygen starvation when I was a child which makes written text composition even more difficult.

Jpeg repair toolkit