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Codec: avc1.421032

99.63% Encoder Support
2,142,190 of 2,150,058 sessions supported encoding
99.8% Decoder Support
2,094,467 of 2,098,620 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5
Maximum Resolution 4K (4096×2176)
Maximum Bitrate 135 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,150,058 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 867,110 / 867,730 99.8% 100,567 / 100,765 — 99.5% 646,742 / 649,991 98.04% 42,839 / 43,694
SafariSafari
 — 99.75% 47,867 / 47,989 99.98% 218,974 / 219,019 — —
EdgeEdge
 100.0% 144,005 / 144,011 100.0% 1,418 / 1,418 — 99.91% 4,275 / 4,279 98.45% 699 / 710
FirefoxFirefox
 95.98% 51,244 / 53,391 99.97% 7,528 / 7,530 — 0.87% 1 / 115 98.81% 5,903 / 5,974

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,098,620 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,836 / 845,039 99.8% 96,839 / 97,034 — 99.65% 637,711 / 639,974 98.34% 41,779 / 42,483
SafariSafari
 — 99.82% 46,505 / 46,588 99.98% 213,332 / 213,377 — —
EdgeEdge
 100.0% 139,968 / 139,974 100.0% 1,371 / 1,371 — 100.0% 4,192 / 4,192 98.72% 695 / 704
FirefoxFirefox
 99.95% 51,633 / 51,657 99.96% 7,307 / 7,310 — 0.93% 1 / 108 98.37% 5,670 / 5,764