This small application is part of the PowerToys that Microsoft launches for its operating systems, that are nothing more than small applications that haven't been included by default in the system, but that can be used to configure or improve some functions. ClearType Tuner is the one in charge of improving how the fonts are seen.
This program shows a series of options and settings that the user will have to choose from to improve how the texts are shown. Of course, at all moments we'll be able to see a test text that modifies its properties in real time. At the same time, it's possible to use an assistant to choose various options so that the program configures the parameters.