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Codec: avc1.421429

87.3% Encoder Support
1,875,177 of 2,147,897 sessions supported encoding
99.8% Decoder Support
2,092,507 of 2,096,710 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4.1
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 50 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,147,897 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,118 / 866,750 99.8% 100,651 / 100,851 — 99.5% 645,894 / 649,145 98.0% 43,076 / 43,957
SafariSafari
 — 1.5% 722 / 48,027 1.82% 3,991 / 218,999 — —
EdgeEdge
 100.0% 143,318 / 143,321 99.93% 1,480 / 1,481 — 99.79% 4,261 / 4,270 98.84% 680 / 688
FirefoxFirefox
 95.91% 51,264 / 53,450 99.96% 7,403 / 7,406 — 1.74% 2 / 115 98.87% 5,841 / 5,908

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,710 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,034 / 844,242 99.79% 96,942 / 97,144 — 99.64% 636,926 / 639,238 98.29% 42,001 / 42,732
SafariSafari
 — 99.85% 46,585 / 46,657 99.98% 213,314 / 213,354 — —
EdgeEdge
 100.0% 139,298 / 139,301 100.0% 1,440 / 1,440 — 100.0% 4,190 / 4,190 98.97% 675 / 682
FirefoxFirefox
 99.97% 51,653 / 51,670 99.94% 7,163 / 7,167 — 1.85% 2 / 108 98.52% 5,597 / 5,681