What does this tool do that others haven't already done? * https://tools.pingdom.com/ https://tools.pingdom.com/ * https://developers.google.com/speed/pagespe

What does this tool do that others haven't already done? * https://tools.pingdom.com/ https://tools.pingdom.com/ * https://developers.google.com/speed/pagespeed/insights/ https://developers.google.com/speed/pagespeed/insights/ * https://developer.microsoft.com/en-us/microsoft-edge/tools/staticscan/ https://developer.microsoft.com/en-us/microsoft-edge/tools/s... * https://observatory.mozilla.org/ https://observatory.mozilla.org/ * https://securityheaders.io/ https://securityheaders.io/ * https://search.google.com/test/mobile-friendly https://search.google.com/test/mobile-friendly I'm sure there are a lot of others...