Validate your images in pixel, centimeter and inch. Show if expected height and width size matches with real height and width, if not calculate what is the different between expected and actual size.
This tool will check/validate/verify your original image size with the desired exam required size/dimension that you have selected.
If your photo's original size/dimension matches with the desired exam required size/dimension it will be the green background.
Else if your photo's original size/dimension does not match with the desired exam required size/dimension because of more than or less than 0.5 or 1 pixel than the required size/dimension, then it will show yellow background.
Otherwise, it will show your image on a red background.
Remember: It will not crop, resize, convert or compress your photo or signature. And You can't download any image