Exiftool is a useful tool for viewing the exif data of an image. This is useful for check the size and colour space of an image before entering it into a competition. It is available here.
It has a nice way of packaging options into the filename so that if you copy the .exe file and rename the copy to exiftool(-k -ProfileDescription -ImageSize).exe you can drag and drop any suitable file onto this renamed file and it will pop up a window with just the profile description and image size in it
then press any key to close the window.
There is also a gui (which I haven’t used myself, but makes it easier to delve into exifdata) here.
Regards Iain