screenresolutiontest.com is legit?

[Guanzo]

I have 27" 2560x1440 res monitor but I checked this site says my resolution is 2138 x 1203. Is this normal? Why not 2560x1440 instead 2138x1203?

 

https://screenresolutiontest.com/

[Biohazard777]

55 minutes ago, Guanzo said:

I have 27" 2560x1440 res monitor but I checked this site says my resolution is 2138 x 1203. Is this normal? Why not 2560x1440 instead 2138x1203?

 

https://screenresolutiontest.com/

Why are you using a random website to check your resolution?
The website can only tell you the "resolution" of the browser window (and even for that it might not be accurate), not your monitor.
I'm gonna take a wild guess and say you are using Windows OS, take a look here:
Start > Settings > System > Display

[jaslion]

It's telling you the resolution of the browser window.

 

Just check it in the system like @Biohazard777 said