Rsizr is an online tool for resizing images, based on a Flash application. In fact, there are many similar tools available online, almost to the point of being overwhelming. What sets Rsizr apart is its use of the image scaling and cropping algorithm first introduced by Israeli professors Shai Avidan and Ariel Shamir at SIGGRAPH 2007, the annual digital graphics conference. The article will touch on this algorithm at the end.