Screen Tester — Pixels, Contrast & Motion
Use fullscreen visual patterns to inspect dead pixels, uniformity, gradients, contrast, sharpness, and motion behavior.
Choose a test
Inspect the entire display at close range. A website cannot automatically see physical dead pixels; this test provides visual patterns for manual inspection.
Refresh-rate estimate
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0%
This is a browser timing estimate, not a laboratory measurement.
Use ←/→ to change patterns, F for fullscreen, and Esc to exit.
How to use this test
Inspect the entire display at close range. A website cannot automatically see physical dead pixels; this test provides visual patterns for manual inspection.
Troubleshooting
- Use browser fullscreen and temporarily disable Night Light, True Tone, HDR processing, or color filters if they affect the pattern.
- A website cannot automatically identify a physical dead pixel; inspect the screen manually at close range.
- Refresh-rate results are estimates and can be affected by background tabs, power saving, browser throttling, and variable refresh rate.