Live Screen Resolution Checker
The actual space available for the webpage.
Physical pixels used per single CSS pixel.
How many bits are used to represent a color.
Current display layout of your device.
🟢 Live data: Resize your browser or rotate your screen to watch the numbers change!
Understanding Screen Resolution
Screen Resolution is the number of distinct pixels in each dimension that can be displayed on a device. It is usually quoted as width × height (for example, "1920 × 1080"). The higher the numbers, the sharper the screen image appears.
What is Device Pixel Ratio (DPR)?
Modern smartphones and high-end monitors (like Apple's Retina displays) have physical screens packed with tiny pixels. To prevent text and images from appearing microscopically small on these high-resolution screens, your device scales objects up.
The Device Pixel Ratio tells you exactly how many physical screen pixels the browser is using to draw one standard CSS pixel. A DPR of 2.0 means a grid of 2x2 (4 total) physical pixels is making up a single digital point on your web page!
Why Developers Use This Tool
- Responsive Web Design: Making sure a web page scales beautifully on massive monitors as well as tiny smartphones.
- Image Optimization: Ensuring that high-resolution images are served only to devices with high DPRs to preserve mobile data bandwidth.