HDR Test Pattern
Evaluate your display HDR performance with standardized test patterns.
Peak brightness, black level, color volume, and tone mapping accuracy are visually assessed. Click Start Test, enable HDR in your OS display settings, and examine each pattern.
What does this test measure?
Peak brightness, black level, color volume, and tone mapping accuracy are visually assessed.
Why is this test important?
Evaluate your display HDR performance with standardized test patterns.
How do you run the test?
Click Start Test, enable HDR in your OS display settings, and examine each pattern.
How should results be interpreted?
Bright highlights without clipping and deep blacks indicate good HDR performance.
Normal and problematic results
Bright highlights without clipping and deep blacks indicate good HDR performance.
Technical limitations
Browser HDR support varies; results depend on OS HDR settings and display certification.
Why can the score decrease?
Unstable measurements, denied permissions, unsupported browser APIs, background load, power saving, or an incomplete test can affect the result. When a score changes, the result screen explains the reason.
What should you do if a problem is found?
Enable HDR in Windows or macOS display settings, update GPU drivers, check HDMI or DP cable.
Example Result Explanation
Frequently Asked Questions
Does this test provide a definitive hardware diagnosis?
No. The test measures signals the browser can safely access and clearly explains its technical limits.
Why can results change between runs?
Background applications, power mode, network conditions, permissions, and operating-system timing can affect results.
How should I repeat the test if I see a problem?
Repeat it on the same device and browser while changing only one condition, so the source of the difference is easier to identify.