Screen Resolution Detector
Detect your screen resolution, viewport size, device pixel ratio, and other display information in real-time.
Detecting your screen...
Why Use Screen Resolution Detector?
Screen Resolution Detector helps developers and designers understand display characteristics across different devices. Whether you're testing responsive designs, optimizing images for different pixel densities, or debugging viewport issues, this tool provides instant access to essential screen information including resolution, pixel ratio, and touch support detection.
Frequently Asked Questions
What is device pixel ratio?
Device pixel ratio (DPR) is the ratio between physical pixels and CSS pixels. A DPR of 2 means each CSS pixel is rendered using 4 physical pixels (2x2), common on Retina displays.
Why is viewport size different from screen resolution?
Screen resolution is your monitor's total pixel count, while viewport size is the visible area in your browser window, which changes when you resize the window or browser UI takes up space.
What does color depth mean?
Color depth indicates the number of bits used to represent each pixel's color. 24-bit means 8 bits per color channel (RGB), allowing for 16.7 million colors.
Why does my phone show a lower resolution than expected?
Phones report logical resolution (CSS pixels) rather than physical pixels. Multiply by the device pixel ratio to get actual physical resolution.
How can I use this for responsive design?
Use the viewport size to test breakpoints, check DPR for image optimization (serve higher resolution images for high DPR screens), and verify touch support for interaction patterns.