Free Network Troubleshooter

The Sonar Lite Extension uses RUM (Real-User Monitoring), which gathers information about your browser’s connection to the Internet and your desired website. Sonar Lite uses this data to determine how fast a web page loads in your browser and can detect errors or latency in your connection.
You can use this information to optimize your website’s performance.

View the performance of any website, and compare the results with dozens of other websites at once. Sonar Lite makes it easy, either visit your desired website through your browser, or choose from a list of your recently visited sites and get instant results in the Sonar Lite Extension.
You can compare your past results with up to the minute data to track performance changes over time.