Screen resolution refers to the total number of pixels that can be displayed on a screen, typically expressed as width × height (e.g., 1920×1080).
What Is My Screen Size & Resolution?
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Screen Resolution: Detecting...
How to Check Your Screen Size
Use this screen size checker to answer common questions like "what is my screen resolution", "what is my screen size", and "what is my viewport size". The tool instantly reports your physical screen resolution, browser viewport, device pixel ratio, color depth, operating system, and browser details. It works on phones, tablets, laptops, desktop monitors, and TVs with no install or signup.
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
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Device Pixel Ratio (DPR)
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Color Depth
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System & Browser
Operating System
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Browser
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Advanced Information
Cookies Enabled
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Touch Support
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User Agent
Related Resources
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Frequently Asked Questions
Viewport size is the visible area of a web page within the browser window, measured in CSS pixels.
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.
It's good practice to check device information when testing responsive designs, debugging display issues, or ensuring your website works correctly across different devices and browsers.