With windows power toys plugin you can resize with a right click and you don't have to open any programs to do it. This is just a small plugin for windows. Try it I think you will agree, it saves a lot of time.
yeah but you can't set the quality of the compression, you can only make a picture bigger or smaller.
i.e.: keeping a picture at 1024x780 but reducing the size of it from 300kb to 100kb
sometime it's ok to have a picture with a lower quality so it doesn't get cramped in a 100x100 picutre.