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Codec: avc1.421428

87.31% Encoder Support
1,876,215 of 2,149,026 sessions supported encoding
99.81% Decoder Support
2,094,185 of 2,098,263 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 20 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,149,026 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,697 / 867,315 99.8% 100,351 / 100,552 — 99.51% 646,038 / 649,197 97.99% 43,123 / 44,006
SafariSafari
 — 1.47% 715 / 48,765 1.86% 4,059 / 218,597 — —
EdgeEdge
 99.99% 143,899 / 143,907 99.93% 1,472 / 1,473 — 99.72% 4,264 / 4,276 99.24% 651 / 656
FirefoxFirefox
 95.77% 50,968 / 53,218 99.99% 7,471 / 7,472 — 1.03% 1 / 97 98.73% 6,008 / 6,085

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,098,263 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,951 / 845,133 99.8% 96,737 / 96,935 — 99.65% 637,077 / 639,309 98.27% 42,045 / 42,787
SafariSafari
 — 99.86% 47,248 / 47,316 99.98% 212,948 / 212,999 — —
EdgeEdge
 99.99% 139,901 / 139,909 100.0% 1,421 / 1,421 — 100.0% 4,202 / 4,202 99.69% 647 / 649
FirefoxFirefox
 99.97% 51,416 / 51,430 99.99% 7,242 / 7,243 — 1.14% 1 / 88 98.46% 5,737 / 5,827