Use Speedtest on all your devices with our free desktop and mobile apps.
How fast is your download speed? In seconds, FAST.com's simple Internet speed test will estimate your ISP speed.
Use TestMySpeed to conduct an internet test in under a minute. All you have to do is click start and our test will run diagnostics behind the scenes and provide ...
Take a speed test to see how strong the connection is in your home (and if you don't already have GFiber, see how it compares to our speeds).
Test your connection fast with Xfinity's internet speed test tool and get tips on how to improve your internet performance.
Test your broadband Internet and WiFi speed with the Internet Speed Test. Check your upload and download speeds for your home Internet network.