googolando ho trovato cose tipo queste:

http://www.websiteoptimization.com/services/analyze/
http://www.webpagetest.org
http://www.hongkiat.com/blog/website...e-check-tools/
http://www.technolik.com/check-browser-compatibility/
http://www.webstockbox.com/web-brows...debug-and-ect/

ho dimenticato qualcosa?