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Compare near-black patches and shadow separation.
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Files and inputs stay on your device. Use Reset to clear this workspace.
Useful to know
What does this tool establish?
Record the lowest patch you distinguish. Ambient reflections, black crush, limited-range settings and viewing angle affect the result; this is not a measured black luminance.
Does this certify the screen?
No. Browser signals, calculations and visual observations cannot certify physical panel specifications or defects.
Where are my files and inputs processed?
Calculations and observations stay in this tab. Optional observation saving starts off and uses only this device. Turn it off or use Clear observation to remove that saved note. Downloaded reports remain on your device.
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