Your screen resolution is the physical pixel grid of your display, shown as width × height such as 1920×1080. The result above detects your current screen resolution instantly in the browser.
What Is My Screen Size & Resolution?
Screen Size
Screen Resolution Test and Screen Size Checker
Use this screen resolution test and screen size checker to answer questions like "what is my screen resolution", "what is my display size", and "what is my viewport size". It reports physical screen resolution, browser viewport, aspect ratio, DPR, color depth, operating system, and browser details on phones, tablets, laptops, desktop monitors, and TVs.
For Developers
Test responsive designs and debug viewport issues
For Designers
Ensure designs work across different screen sizes
For QA
Verify display compatibility and pixel density
Device Information
Display Properties
Aspect Ratio
Device Pixel Ratio (DPR)
Color Depth
System & Browser
Operating System
Browser
Advanced Information
Cookies Enabled
Touch Support
User Agent
Related Resources
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Frequently Asked Questions
Screen resolution is the full physical pixel size of the display. Viewport size is the visible browser area available to a web page, measured in CSS pixels, so it can be smaller than the full screen.
Device Pixel Ratio (DPR) is the ratio between physical pixels and CSS pixels, used to support high-resolution (Retina) displays.
Understanding screen sizes, resolutions, and DPR helps developers create responsive websites that look great on all devices. It's essential for optimizing user experience across different screens.
Open this page and the tool automatically runs a screen resolution test. It shows your resolution, display size, viewport, DPR, aspect ratio, and browser details without installing anything.