Aalto Interface Metrics (AIM) is a new service that lets you automatically test the usability and aesthetics of your websites using several verified user interface metrics. Simply enter a webpage URL or upload a screenshot, and select desired metrics to get started. AIM segments the page, and displays a preview. As results are computed, they are presented along with detailed explanations, and histograms for comparison. AIM is fully open-sourced, and we invite you to extend the service with your own contributions. Head over to interfacemetrics.aalto.fi to give it a try, and for more information.