How to interpret the result
CSS pixels differ from physical pixels when scaling is active. Multiply viewport dimensions by device pixel ratio for an approximation, not a panel certificate.
PX / 2 min
Display geometry and scaling
Inspect viewport size, screen resolution, pixel ratio, orientation, color depth, and fullscreen behavior.
Local-firstNo accountExportable report
LIVE
LOCALLive test
Waiting for a test.
What this browser test can and cannot prove
The browser may report the current logical mode rather than the panel’s native resolution, especially with operating-system scaling or mirrored displays.
REPORT
Reports →Keep this result in a local inspection report.
RELATED
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Cycle solid red, green, blue, white, black, and neutral backgrounds to inspect the panel edge to edge.
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Estimate the browser’s animation cadence and inspect frame-time stability with requestAnimationFrame.
Open testColor gradients and banding
Inspect grayscale and RGB ramps for abrupt steps, clipping, tint, posterization, and dithering patterns.
Open testKNOWLEDGE
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The limits of browser hardware tests
A browser can verify useful behavior without becoming firmware diagnostics, a lab instrument, a repair tool, or proof of internal component identity.
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