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Codec: avc1.421016

99.64% Encoder Support
2,140,819 of 2,148,653 sessions supported encoding
99.8% Decoder Support
2,093,502 of 2,097,625 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 2,148,653 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,963 / 867,550 99.8% 100,292 / 100,496 — 99.51% 646,188 / 649,390 97.96% 42,994 / 43,888
SafariSafari
 — 99.77% 47,726 / 47,834 99.97% 218,277 / 218,333 — —
EdgeEdge
 99.99% 144,209 / 144,217 100.0% 1,403 / 1,403 — 99.91% 4,245 / 4,249 98.99% 686 / 693
FirefoxFirefox
 95.94% 51,475 / 53,653 99.93% 7,463 / 7,468 — 0.0% 0 / 120 98.79% 5,855 / 5,927

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,097,625 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 845,030 / 845,210 99.79% 96,734 / 96,938 — 99.65% 637,151 / 639,379 98.22% 41,938 / 42,698
SafariSafari
 — 99.84% 46,365 / 46,440 99.97% 212,662 / 212,718 — —
EdgeEdge
 100.0% 140,144 / 140,151 100.0% 1,356 / 1,356 — 100.0% 4,172 / 4,172 99.27% 680 / 685
FirefoxFirefox
 99.96% 51,800 / 51,822 99.92% 7,237 / 7,243 — 0.0% 0 / 107 98.4% 5,604 / 5,695