Screen Resolution
How to Use
Your screen information is displayed automatically. Resize the browser window to see the viewport size update in real time.
What is Screen Resolution?
Screen resolution refers to the number of pixels displayed on your screen, expressed as width by height (e.g., 1920x1080). Higher resolution means more pixels and sharper images. Related concepts include DPI (dots per inch), which measures pixel density, and the viewport, which is the visible area of a web page within the browser window. The device pixel ratio (DPR) indicates how many physical pixels correspond to one CSS pixel — high-DPI displays like Retina screens have a DPR of 2 or more, delivering crisper text and images.
Screen Information
Screen resolution is the total pixel count of your display. Viewport size is the visible area of the web page. Device pixel ratio indicates how many physical pixels map to one CSS pixel (2x for Retina displays). Color depth shows the number of bits used per pixel.
Common Use Cases
- Responsive design — check viewport dimensions to test and debug responsive layouts
- Screenshot sizing — determine your exact screen resolution for pixel-perfect screenshots
- Display comparison — compare resolution and pixel density across different devices
- Media queries — verify breakpoint behavior by checking actual viewport width
- Presentation setup — confirm display resolution before connecting to a projector or external monitor
Features
Real-time viewport tracking updates dimensions as you resize the browser window. Full display information includes screen resolution, viewport size, device pixel ratio, color depth, orientation, and aspect ratio. All values are read from standard browser APIs with zero latency. Works on desktop, tablet, and mobile devices — useful for checking your current device's capabilities from any browser.
Privacy
All information is read from your browser's built-in APIs. No data is sent to any server.