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Codec: avc1.420832

87.34% Encoder Support
1,875,396 of 2,147,355 sessions supported encoding
99.8% Decoder Support
2,092,043 of 2,096,219 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 2,147,355 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 867,179 / 867,798 99.78% 100,579 / 100,796 — 99.51% 644,962 / 648,141 98.06% 42,759 / 43,605
SafariSafari
 — 1.47% 706 / 48,100 1.88% 4,111 / 218,444 — —
EdgeEdge
 99.99% 143,779 / 143,788 100.0% 1,484 / 1,484 — 99.76% 4,212 / 4,222 98.61% 637 / 646
FirefoxFirefox
 95.93% 51,194 / 53,366 99.96% 7,370 / 7,373 — 0.0% 0 / 116 98.74% 5,945 / 6,021

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,219 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 845,031 / 845,234 99.77% 96,915 / 97,135 — 99.64% 635,908 / 638,174 98.28% 41,709 / 42,441
SafariSafari
 — 99.83% 46,659 / 46,737 99.97% 212,793 / 212,849 — —
EdgeEdge
 99.99% 139,741 / 139,750 100.0% 1,436 / 1,436 — 100.0% 4,148 / 4,148 98.91% 633 / 640
FirefoxFirefox
 99.97% 51,591 / 51,608 99.96% 7,145 / 7,148 — 0.0% 0 / 102 98.44% 5,683 / 5,773