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Codec: avc1.420c32

87.31% Encoder Support
279,427 of 320,027 sessions supported encoding
99.93% Decoder Support
269,075 of 269,251 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 320,027 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 143,541 / 143,789 99.91% 19,761 / 19,779 — 99.77% 63,581 / 63,728 98.74% 7,668 / 7,766
SafariSafari
 — 1.83% 154 / 8,424 1.59% 496 / 31,178 — —
EdgeEdge
 100.0% 30,837 / 30,838 99.73% 363 / 364 — 99.57% 932 / 936 98.36% 60 / 61
FirefoxFirefox
 95.98% 9,285 / 9,674 100.0% 1,341 / 1,341 — 0.0% 0 / 32 98.48% 1,296 / 1,316

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,251 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 121,393 / 121,421 99.89% 16,091 / 16,108 — 99.99% 53,856 / 53,861 98.9% 6,503 / 6,575
SafariSafari
 — 99.93% 7,070 / 7,075 99.99% 25,557 / 25,559 — —
EdgeEdge
 100.0% 26,929 / 26,930 100.0% 320 / 320 — 100.0% 867 / 867 98.15% 53 / 54
FirefoxFirefox
 100.0% 7,894 / 7,894 100.0% 1,098 / 1,098 — 0.0% 0 / 25 99.26% 1,072 / 1,080