Check screen resolution free — view monitor resolution, DPI, pixel ratio, aspect ratio and color depth instantly. Browser-based, no install.
Screen Resolution Tool is a free online tool that displays your device's screen resolution, viewport size, DPR, and color depth. Useful for responsive design development and debugging with real-time window resize detection. Browser-based processing — completely free.
lock Your files never leave your device
How to use Screen Resolution?
Open the page to automatically see your device's screen information.
Resize the browser window to see real-time updates.
Copy the information you need.
Frequently asked questions about Screen Resolution
What is DPR (Device Pixel Ratio)?
DPR is the number of physical pixels per CSS pixel. A DPR of 2 indicates a Retina display, meaning images should be 2x larger for crisp display.
What is the difference between screen resolution and viewport size?
Screen resolution is the total physical pixels of your monitor, while viewport is the area where content is displayed in the browser, excluding toolbars and scrollbars.