Which video and audio formats can your TV play?
A focused check: which video codecs (H.264, HEVC, VP9, AV1) and audio codecs (AAC, Opus, Dolby Digital) your TV's browser can decode. Takes a second, runs on the TV itself.
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 codec test reads which video codecs (H.264, HEVC, VP9, AV1) and audio codecs (AAC, Opus, Dolby Digital, Dolby Digital Plus) your TV's browser can decode, straight from the TV. The honest limit: this describes the browser, not the TV as a whole, and TV browsers commonly decode fewer formats than the TV's own streaming apps do, sometimes by years. A missing codec here rarely means anything is actually broken. For the full picture, 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. If a codec shows supported, this browser genuinely decoded it. If it shows not supported, this browser genuinely could not, at the moment of testing.
A separate question entirely. Your TV can decode AV1 inside its Netflix app while its browser fails the same codec, because TV browsers are frequently years behind the TV's own built-in software.
Usually not. H.264 is the universal fallback almost every service can use. Missing HEVC, VP9 or AV1 in a browser rarely changes what you can actually watch through the TV's own apps.
Questions people ask
The test says my TV does not support AV1. Is that a problem?
Almost certainly not. This test reads what the TV's web browser can decode, and TV browsers are typically several years behind the TV's own apps. Your Netflix or YouTube app may well play AV1 perfectly while the browser cannot. Missing AV1 in a browser is normal and rarely affects anything you actually watch.
What is the difference between H.264, HEVC, VP9 and AV1?
H.264 is the oldest and most universal, supported by effectively everything. HEVC (H.265) and VP9 carry most current 4K streaming. AV1 is the newest and most efficient, which is why Netflix and YouTube prefer it where a device can decode it, since it uses less bandwidth for the same quality.
Does this test check Dolby Digital or Dolby Atmos?
It checks whether the browser can decode Dolby Digital (AC-3) and Dolby Digital Plus (E-AC-3), the compressed audio formats behind most streaming. Dolby Atmos is an object-based extension carried inside Dolby Digital Plus or TrueHD streams, and whether it actually plays as Atmos depends on your full audio chain, not just browser codec support. Our guide on what Dolby Atmos needs to work covers the rest of that chain.
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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