HDR & Peak Brightness Test
Detect display HDR support, test 400 to 1000-nit luminance targets, and inspect highlight tone clipping.
Near-White Highlight Clipping Scale
On a properly calibrated HDR screen, every numbered square from #1 to #16 should be distinctly visible against the background.
What is High Dynamic Range (HDR)?
HDR (High Dynamic Range) is a display technology that expands contrast ratio and color depth, rendering specular highlights up to 1,000+ nits alongside deep shadow details without highlight clipping.
Frequently Asked Questions
How do I test HDR on my monitor? ↓
First, enable HDR in your operating system settings (Windows 11: Settings -> System -> Display -> Use HDR; macOS: System Settings -> Displays -> High Dynamic Range). Then, use our HDR pattern tool below to inspect peak luminance targets and white highlight clipping.
What is the difference between DisplayHDR 400, 600, and 1000? ↓
DisplayHDR 400 requires a minimum peak brightness of 400 nits (basic HDR). DisplayHDR 600 requires 600 nits with local dimming. DisplayHDR 1000 and True Black (OLED) require 1000+ nits peak brightness for true deep contrast and realistic highlights.
Why does HDR look washed out on my Windows monitor? ↓
HDR looks washed out on Windows if 1) SDR content brightness slider is set too low, 2) Your monitor lacks local dimming (e.g. basic IPS edge-lit HDR400), or 3) Windows HDR Color Management calibration has not been run.
What is DCI-P3 and Rec.2020 color gamut? ↓
DCI-P3 is the cinema color standard covering 25% more colors than sRGB. Rec.2020 is the wide gamut target for ultra-high-definition 4K HDR displays.
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