Does your TV signal HDR?
A focused check: whether your TV's browser signals HDR support and how wide a color gamut it claims. Takes a second, runs on the TV itself, and is honest about what a browser can and cannot see.
Your results
This test needs JavaScript to run. Everything below still explains what it checks and what each result means, so the page is useful either way.
Reading your TV...
This takes a moment.
Quick answer
The HDR test reads whether your TV's browser signals HDR support and how wide a color gamut it claims, in a couple of seconds, straight from the TV. It is honest about the limit that matters most: this checks the browser's HDR pipeline, not the panel's real brightness, and a TV browser often does not pass HDR through even on a set that handles it perfectly well in its own apps. For the full picture, including codecs and copy protection, run the TV Capability Test.
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What this test can and cannot tell you
Plenty of TV testing tools overstate what a web page can see. Here is exactly where the limits are.
Reliable, but only for this browser. If the browser signals HDR, an HDR pipeline genuinely exists here. If it does not, that is often a browser limitation rather than proof the panel or the TV's apps lack HDR.
No web page can measure this. No browser exposes peak brightness and no rendering trick reveals it. Real brightness needs a colorimeter.
Not distinguishable from a browser. The signal this test reads is a single yes-or-no flag. It cannot tell you which specific HDR format is in use; the TV's own settings menu or spec sheet is the source for that.
The device's own claim, reported, not measured. A wide gamut claim is a prerequisite for convincing HDR, but it is not independently verified here.
Questions people ask
My TV has HDR but this test says no. What is going on?
Almost always a browser limitation, not a panel one. TV web browsers frequently do not pass an HDR signal through even on sets that handle HDR perfectly well in their own streaming apps. This test can only report what the browser itself signals, and it says so plainly.
Can this test tell me if I have Dolby Vision or just HDR10?
No. A browser exposes a single HDR yes-or-no signal, not which specific format is behind it. To confirm Dolby Vision, HDR10+ or HLG support, check your TV's specification sheet or its picture settings menu while playing HDR content.
Does this measure how bright my TV's HDR actually gets?
No, and no website can. Peak brightness in nits is never exposed to a web page by any browser. This test only reports whether HDR is signalled, not how well it is implemented. Measuring real brightness needs a colorimeter held against the screen.
Is any of this sent to your servers?
No. The check runs in your browser and shows the result right there; we do not receive or store it, and there is no account. Details are in our privacy policy.
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