← Back to Codec Support Table

Codec: avc1.42003c

87.23% Encoder Support
280,069 of 321,078 sessions supported encoding
87.8% Decoder Support
237,204 of 270,152 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 6
Maximum Resolution 8K (8192×4352)
Maximum Bitrate 240 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 321,078 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.82% 144,198 / 144,457 99.8% 19,779 / 19,818 — 99.67% 63,423 / 63,630 98.37% 7,619 / 7,745
SafariSafari
 — 2.0% 174 / 8,698 1.51% 471 / 31,141 — —
EdgeEdge
 99.98% 31,028 / 31,033 99.73% 376 / 377 — 99.79% 946 / 948 96.36% 53 / 55
FirefoxFirefox
 95.99% 9,253 / 9,640 100.0% 1,334 / 1,334 — 0.0% 0 / 35 98.88% 1,323 / 1,338

VideoDecoder Support Matrix

Browser × Platform decoder support from 270,152 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.95% 122,101 / 122,158 99.77% 16,101 / 16,138 — 99.86% 53,582 / 53,659 98.46% 6,472 / 6,573
SafariSafari
 — 1.93% 141 / 7,307 1.48% 378 / 25,509 — —
EdgeEdge
 99.98% 27,055 / 27,060 100.0% 327 / 327 — 100.0% 867 / 867 97.96% 48 / 49
FirefoxFirefox
 99.91% 7,883 / 7,890 99.91% 1,105 / 1,106 — 0.0% 0 / 25 99.27% 1,082 / 1,090