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Codec: avc1.420c33

87.31% Encoder Support
1,874,828 of 2,147,300 sessions supported encoding
99.8% Decoder Support
2,092,025 of 2,096,235 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 2,147,300 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 865,574 / 866,186 99.8% 100,378 / 100,575 — 99.49% 646,369 / 649,671 98.05% 42,744 / 43,593
SafariSafari
 — 1.51% 728 / 48,103 1.84% 4,025 / 218,740 — —
EdgeEdge
 99.99% 143,474 / 143,488 100.0% 1,465 / 1,465 — 99.93% 4,180 / 4,183 98.23% 666 / 678
FirefoxFirefox
 95.89% 51,328 / 53,528 100.0% 7,498 / 7,498 — 0.0% 0 / 101 98.71% 5,914 / 5,991

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,235 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 843,555 / 843,752 99.8% 96,594 / 96,786 — 99.64% 637,520 / 639,822 98.29% 41,696 / 42,421
SafariSafari
 — 99.81% 46,602 / 46,691 99.98% 213,094 / 213,136 — —
EdgeEdge
 99.99% 139,498 / 139,511 100.0% 1,427 / 1,427 — 100.0% 4,115 / 4,115 98.66% 664 / 673
FirefoxFirefox
 99.97% 51,719 / 51,734 99.99% 7,247 / 7,248 — 0.0% 0 / 92 98.17% 5,630 / 5,735