This speed test is free, fast and accurate. To achieve this, you just need an internet connection and close all open internet windows. You should not perform any downloads during this test either. We will also allow you to interpret the different results of this test and apply tips or even changes to improve your internet speed. The first functionality of an internet speed test is to identify the reality of your bandwidth, that is to say, the speed of your internet connection in uplink and downstream speed. This test works with all types of connection: ADSL, ADSL 2+, cable, optical fiber and mobile Internet in 3G / 4G. In the event of an internet connection problem, if for example it is too slow or suddenly decreased, the speed test will identify the problem in order to require a correction from your operator. In fact, when you subscribe to an ADSL or fiber connection offer, you are allocated a theoretical connection speed. Carrying out the speed test will allow you to see if the speed announced by your operator is respected and if this is not the case, to obtain redress. Whatever type of internet access you have purchased, the connection speed like that of the ADSL test pattern will be measured in Megabits or Kilobits per second. More exceptionally, the speed of the fiber is expressed in Gigabits.