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Monitor Test Patterns
Diagnose dead pixels, uniformity, overscan, and color banding with a suite of monitor test patterns.
Full screen mode is unavailable in this environment.
View the patterns in a dim room for best results. Inspect corners for color tinting, look for ghosting on the checkerboard while scrolling, and use the grid to align your display’s scaling controls.
What this tool does
Monitor Test Patterns helps you diagnose dead pixels, uniformity, overscan, and color banding with a suite of monitor test patterns.
What you get
Monitor Test Patterns produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.
Report a bug
If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.