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Codec: avc1.421033

99.63% Encoder Support
2,139,266 of 2,147,193 sessions supported encoding
99.81% Decoder Support
2,092,035 of 2,096,073 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5.1
Maximum Resolution 8K (8192×4352)
Maximum Bitrate 240 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,147,193 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 867,009 / 867,640 99.8% 100,405 / 100,604 — 99.5% 646,706 / 649,943 98.11% 42,607 / 43,427
SafariSafari
 — 99.75% 47,853 / 47,972 99.98% 217,686 / 217,738 — —
EdgeEdge
 99.99% 142,980 / 142,993 100.0% 1,486 / 1,486 — 99.86% 4,159 / 4,165 98.88% 709 / 717
FirefoxFirefox
 95.75% 51,108 / 53,375 99.95% 7,428 / 7,432 — 1.03% 1 / 97 99.04% 6,060 / 6,119

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,073 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,977 / 845,180 99.8% 96,669 / 96,864 — 99.65% 637,598 / 639,810 98.4% 41,530 / 42,204
SafariSafari
 — 99.84% 46,554 / 46,629 99.98% 212,192 / 212,244 — —
EdgeEdge
 99.99% 139,068 / 139,080 100.0% 1,443 / 1,443 — 100.0% 4,082 / 4,082 99.15% 704 / 710
FirefoxFirefox
 99.97% 51,568 / 51,586 99.94% 7,190 / 7,194 — 1.16% 1 / 86 98.45% 5,783 / 5,874