Output
CSS dimensions; pixel ratio; capability signals
UserBenchmark / All Tools / HDR Capability Test
Display
HDR Capability Test
Check browser-reported HDR and wide color gamut capabilities.
Free to useNo downloadNo sign-up
HDR Capability Test · At a glance
Quick answer: Check browser-reported HDR and wide color gamut capabilities. A positive capability signal means the browser reports support.
HDR Capability Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Inspect browser-reported dynamic-range and color-gamut capabilities.
- Compare after enabling the intended OS display mode.
Input
Browser screen and viewport properties
Browser requirement
Screen API; devicePixelRatio; media queries
Processing
Runs on your device; no tool-result upload
How it works and what the result means
The result is a mathematical estimate under the stated formula. It does not read your hardware or change system settings.
Reading the result
A positive capability signal means the browser reports support. It does not establish peak luminance, local dimming quality or HDR accuracy.
What to check next
Check the selected monitor, OS HDR setting and browser support if signals differ from expectations.
Keep consistent units and compare the assumptions with your actual game, display or network configuration.
Frequently asked questions
Does HDR support guarantee good HDR picture quality?
No. Brightness, black level, tone mapping and color performance require separate physical evaluation.
How do I start the HDR Capability Test?
Enter your own values and press Calculate. Units are shown beside each field; invalid or impossible values are rejected.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.