Check your screen resolution and device details.
Resolution is the number of pixels your screen displays, written as width × height. This tool shows your screen size, the browser window size and the device pixel ratio.
High-density screens pack several physical pixels into one CSS pixel. A device pixel ratio of 2 means each CSS pixel uses a 2 × 2 block of physical pixels, which is why text looks sharp. Web designers work in CSS pixels.
It helps you test responsive designs, choose wallpapers and export images at the right size.