Test your connection fast with Xfinity’s internet speed test tool and get tips on how to improve your internet performance.

Our speed test starts by measuring your connection’s latency. To do this, it sends a small amount of data from your device to the nearest test server and measures how long it takes to receive a response.

Test your Internet upload and download speeds to see how Comcast Business Internet compares to the competition. Get a free quote today for speeds up to 1 Gig.

Use Speedtest on all your devices with our free desktop and mobile apps.

Why don't results match my plan? This test doesn't measure the speed of your plan but instead, looks at the speed that's reaching your device. We've explained in more detail below.

Wondering if you’re really getting the Xfinity internet speeds you’re paying for? Use our Xfinity speed test to measure your download speed, upload speed, and ping (latency) in real time.

Tips and Tools for understanding your speed test results related to your device and plan, and how to improve your speed and resolve wifi issues.

The Comcast internet speed test is the ultimate tool for checking your internet speed. With the help of this tool, you can measure the downloading, uploading speeds, latency, and jitter of your internet …

Run an Xfinity speed test to see how fast your internet speed is and find ways to improve your overall speed.

To use the Xfinity Speed Test, go to speedtest.xfinity.com using your desktop or handheld device’s browser and select Start Test. The Xfinity Speed Test is also available in the Xfinity app (Apple App …