Screen resolution
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Live browser diagnostic
What Is My Screen Size?
Check your live screen resolution, viewport size, DPR, browser, OS, orientation, color depth, and refresh rate.
Your screen and viewport summary
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A quick one-line summary of the most useful display and browser measurements.
Screen
Physical display pixel grid.
Viewport
CSS area available to the webpage.
DPR
Physical pixels per CSS pixel.
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Full diagnostics
Detailed browser, display, viewport, DPR, OS, orientation, color depth, and refresh-rate values.
Current viewport
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This is the CSS viewport your website sees.
Device pixel ratio
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Visual viewport
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Browser
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Operating system
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Orientation
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Color depth
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Refresh rate
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Zoom/scaling note: Checking…
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How to use this result
The dashboard shows screen resolution, viewport size, DPR, browser, operating system, orientation, color depth, and estimated refresh rate in one place.
Copy all details to quickly share your environment with developers, designers, or QA testers.
Privacy note
This MVP checker runs in your browser. It does not require signup, file uploads, or personal account data to show your screen metrics.
MVP checker guide
What this checker measures
The MVP checker combines the most important browser-side display values into one privacy-friendly result card. It runs locally in the browser and updates when the window size, orientation, zoom, or visual viewport changes.
Use it for QA reports
Copy the complete result when reporting layout bugs so developers can reproduce the exact screen, viewport, DPR, browser, and OS environment.
Use it for responsive design
Viewport and DPR values help explain why a page may look different on devices with similar physical resolutions.
Use it without account setup
The result is calculated in your browser. The checker does not require login, uploads, or personal device data.
Frequently asked questions
Is screen size the same as viewport size?
No. Screen size is the display pixel grid, while viewport size is the browser area available to the web page.
Does this checker collect my device data?
No account or upload is required. The page reads standard browser values locally and displays them for you.
Why can my viewport change while resizing?
Viewport dimensions change when the browser window, browser chrome, zoom level, orientation, or split-screen mode changes.
Why does DPR matter?
DPR helps developers prepare sharp images and test layouts on high-density screens.
Content cluster
Related guides
Use these supporting guides to understand the tool result and next testing steps.
Related tools
Continue with another ScreenMetricLab utility.