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Codec: avc1.421433

87.36% Encoder Support
1,876,634 of 2,148,172 sessions supported encoding
99.81% Decoder Support
2,093,175 of 2,097,243 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 2,148,172 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,868 / 867,493 99.8% 100,257 / 100,456 — 99.5% 645,505 / 648,733 98.1% 43,430 / 44,270
SafariSafari
 — 1.64% 788 / 47,971 1.87% 4,085 / 218,118 — —
EdgeEdge
 100.0% 144,261 / 144,267 99.93% 1,461 / 1,462 — 99.86% 4,182 / 4,188 98.97% 670 / 677
FirefoxFirefox
 95.81% 51,304 / 53,547 99.97% 7,393 / 7,395 — 0.0% 0 / 113 98.84% 5,950 / 6,020

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,097,243 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,950 / 845,140 99.8% 96,529 / 96,727 — 99.65% 636,581 / 638,844 98.4% 42,331 / 43,021
SafariSafari
 — 99.83% 46,494 / 46,572 99.98% 212,527 / 212,576 — —
EdgeEdge
 100.0% 140,334 / 140,340 100.0% 1,420 / 1,420 — 100.0% 4,106 / 4,106 98.96% 666 / 673
FirefoxFirefox
 99.96% 51,703 / 51,723 99.97% 7,166 / 7,168 — 0.0% 0 / 103 98.38% 5,692 / 5,786