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Codec: avc1.420832

87.38% Encoder Support
280,578 of 321,103 sessions supported encoding
99.93% Decoder Support
269,789 of 269,967 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 321,103 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.84% 144,320 / 144,558 99.91% 19,776 / 19,793 — 99.78% 63,528 / 63,669 98.86% 7,513 / 7,600
SafariSafari
 — 1.82% 155 / 8,506 1.66% 515 / 31,076 — —
EdgeEdge
 100.0% 31,260 / 31,260 100.0% 376 / 376 — 99.7% 994 / 997 98.48% 65 / 66
FirefoxFirefox
 96.16% 9,403 / 9,779 100.0% 1,258 / 1,258 — 0.0% 0 / 40 98.57% 1,308 / 1,327

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,967 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,961 / 121,994 99.9% 16,116 / 16,132 — 99.98% 53,691 / 53,702 99.01% 6,372 / 6,436
SafariSafari
 — 99.93% 7,138 / 7,143 99.98% 25,475 / 25,481 — —
EdgeEdge
 100.0% 27,222 / 27,222 100.0% 328 / 328 — 100.0% 923 / 923 100.0% 60 / 60
FirefoxFirefox
 100.0% 8,021 / 8,021 100.0% 1,033 / 1,033 — 0.0% 0 / 26 99.63% 1,075 / 1,079