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Codec: avc1.420433

87.32% Encoder Support
1,876,864 of 2,149,379 sessions supported encoding
99.8% Decoder Support
2,094,014 of 2,098,212 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 2,149,379 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 867,489 / 868,124 99.8% 99,951 / 100,152 — 99.5% 645,972 / 649,231 97.84% 43,084 / 44,033
SafariSafari
 — 1.59% 768 / 48,247 1.85% 4,045 / 218,653 — —
EdgeEdge
 99.99% 143,940 / 143,951 99.93% 1,472 / 1,473 — 99.91% 4,282 / 4,286 98.88% 705 / 713
FirefoxFirefox
 95.9% 51,281 / 53,475 99.95% 7,405 / 7,409 — 0.0% 0 / 86 98.73% 5,995 / 6,072

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,098,212 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 845,307 / 845,511 99.79% 96,304 / 96,504 — 99.64% 636,982 / 639,269 98.2% 42,095 / 42,867
SafariSafari
 — 99.83% 46,769 / 46,847 99.98% 212,955 / 212,998 — —
EdgeEdge
 99.99% 140,005 / 140,016 100.0% 1,427 / 1,427 — 100.0% 4,201 / 4,201 99.01% 703 / 710
FirefoxFirefox
 99.96% 51,673 / 51,696 99.93% 7,169 / 7,174 — 0.0% 0 / 82 98.49% 5,747 / 5,835