Description
About HDR Test
Introduction
This page reports whether the browser thinks high dynamic range may be available, using simple capability checks. Browsers do not expose a calibrated HDR movie pipeline or peak brightness in nits to ordinary web pages. Expect hints and a bright preview, not a TV calibration report.
What this tool does
It reads HDR-related media queries and screen hints, and can show a bright gradient preview. It does not play HDR10/Dolby Vision content or measure panel peak luminance.
When to use it
Use it when you want a quick “does this browser/display path claim HDR?” signal. Use your display’s built-in HDR demo or a known HDR video for real picture checks.
How it works
Supported: Chromium and Safari often expose dynamic-range media queries; results vary by OS and display mode. Unsupported or weak: many setups report only standard range even on HDR TVs if the OS window is not in an HDR path. Permissions: none. Hardware: an HDR-capable display helps the hint read “high,” but the page still cannot certify HDR mastering. Expected: capability labels plus a bright preview; not a pass/fail HDR certification.
Step-by-step instructions
- Press Start to read capability hints.
- Optionally enter fullscreen for the bright preview.
- Compare with your OS HDR toggle if results look surprising.
- Stop when finished.
Common problems
An HDR TV with OS HDR off often looks “standard” here. That is expected. This page is not a nit meter.
Privacy explanation
Checks run locally. No camera, microphone, or file upload is used.