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Codec: avc1.421016

99.71% Encoder Support
319,545 of 320,476 sessions supported encoding
99.93% Decoder Support
269,273 of 269,449 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 2.2
Maximum Resolution SD/DVD (720×480)
Maximum Bitrate 4 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,476 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.84% 143,735 / 143,963 99.89% 19,505 / 19,526 — 99.79% 63,434 / 63,565 98.93% 7,684 / 7,767
SafariSafari
 — 99.94% 8,441 / 8,446 100.0% 31,395 / 31,396 — —
EdgeEdge
 99.99% 31,184 / 31,186 100.0% 336 / 336 — 99.71% 1,035 / 1,038 98.18% 54 / 55
FirefoxFirefox
 96.11% 9,381 / 9,761 100.0% 1,299 / 1,299 — 0.0% 0 / 43 98.75% 1,263 / 1,279

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,449 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,588 / 121,623 99.88% 15,949 / 15,968 — 99.99% 53,550 / 53,554 99.07% 6,516 / 6,577
SafariSafari
 — 99.93% 7,048 / 7,053 100.0% 25,780 / 25,781 — —
EdgeEdge
 100.0% 27,119 / 27,120 100.0% 289 / 289 — 100.0% 961 / 961 100.0% 47 / 47
FirefoxFirefox
 99.99% 7,929 / 7,930 100.0% 1,074 / 1,074 — 0.0% 0 / 30 99.24% 1,039 / 1,047