Have you ever wanted to just 'resize' an image? Nothing fancy, just do it! Then Picture Resizer is just perfect. Upload an image, then - resize / crop / rotate - as desired. Choose quality and download.
It's even possible to choose the exact width in pixels. (Height will adjust automatically.) The image is stored on the site for 20 minutes, so it is there if you want to go 'back' and make a change.