How fast is your download speed? In seconds, FAST.com's simple Internet speed test will estimate your ISP speed.

FAST definition: moving or able to move, operate, function, or take effect quickly; quick; swift; rapid: a fast pain reliever; See examples of fast used in a sentence.

Grammar Fast, quick or quickly? Fast and quick mean moving with great speed. Fast is both an adjective and an adverb. Quick is an adjective and the adverb form is quickly. …

Check your internet speed with our simple and fast speed test. Get detailed results for your download speed, upload speed, and personalized insights into your connection performance.

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

Test your internet speed in seconds with FastSpeedTest.com. Measure your download and upload speeds, ping, and jitter accurately on broadband, WiFi, or mobile networks.

fast, rapid, swift, fleet, quick, speedy, hasty, expeditious mean moving, proceeding, or acting with celerity. fast and rapid are very close in meaning, but fast applies particularly to the thing that moves

Run a free Internet Speed Test in your browser. No app needed. Fast, accurate HTML5 SpeedTest for any device measuring download, upload, ping, and jitter.

An internet speed test measures the connection speed and quality of your connected device to the internet. It does so by running multiple consecutive tests that analyze different aspects of your …