About
WhatIsMyScreenSize.com is a comprehensive online resource for understanding and comparing display technology. The site automatically detects your device's screen size, resolution, aspect ratio, pixel density (PPI), refresh rate, and other display characteristics directly in your browser, without collecting or storing personal data.
The website also maintains an extensive database of smartphones, tablets, laptops, monitors, and other devices, allowing users to compare screen sizes, resolutions, display technologies, and pixel densities side by side before purchasing. Educational guides explain topics such as Retina displays, device pixel ratio (DPR), CSS pixels, monitor scaling, and choosing the right accessories for different screen sizes, making the site valuable for both professionals and everyday consumers.
Fact Sheet
Discussion
Simple and to the point. Checking your screen dimensions instantly is one of those small things that is handy for designers and developers testing layouts.