Most cameras these days take high resolution photos that are both large in file size and beyond the resolution of your computer monitor. They are often to large to email. This tool can be used to shrink your images, both in dimension and physical size (on disk). Select the max width/height (or choose no size reduction). Change the compression percentage. Have the program overwrite the original file or create a new one. Works with .jpg, .gif, .bmp or .tif/tiff.