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Codec: avc1.420c33

87.24% Encoder Support
279,685 of 320,597 sessions supported encoding
99.94% Decoder Support
269,360 of 269,533 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 320,597 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 143,637 / 143,877 99.9% 19,785 / 19,804 — 99.76% 63,347 / 63,501 99.0% 7,614 / 7,691
SafariSafari
 — 2.11% 183 / 8,678 1.5% 468 / 31,265 — —
EdgeEdge
 99.99% 31,228 / 31,231 100.0% 377 / 377 — 99.89% 934 / 935 98.15% 53 / 54
FirefoxFirefox
 96.11% 9,304 / 9,681 100.0% 1,336 / 1,336 — 0.0% 0 / 35 98.65% 1,319 / 1,337

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,533 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,409 / 121,443 99.89% 15,998 / 16,015 — 99.98% 53,643 / 53,652 99.25% 6,470 / 6,519
SafariSafari
 — 99.89% 7,258 / 7,266 99.99% 25,658 / 25,661 — —
EdgeEdge
 99.99% 27,252 / 27,254 100.0% 339 / 339 — 100.0% 867 / 867 97.96% 48 / 49
FirefoxFirefox
 99.99% 7,886 / 7,887 100.0% 1,086 / 1,086 — 0.0% 0 / 26 99.08% 1,072 / 1,082