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Codec: avc1.421428

87.25% Encoder Support
279,612 of 320,472 sessions supported encoding
99.94% Decoder Support
269,560 of 269,710 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 20 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,472 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.82% 143,756 / 144,009 99.9% 19,632 / 19,651 — 99.79% 63,431 / 63,567 99.06% 7,676 / 7,749
SafariSafari
 — 1.98% 175 / 8,859 1.54% 477 / 31,051 — —
EdgeEdge
 100.0% 31,091 / 31,091 99.72% 360 / 361 — 99.37% 946 / 952 98.39% 61 / 62
FirefoxFirefox
 95.97% 9,215 / 9,602 100.0% 1,330 / 1,330 — 0.0% 0 / 27 98.97% 1,342 / 1,356

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,710 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 121,798 / 121,827 99.88% 16,015 / 16,034 — 99.98% 53,669 / 53,679 99.3% 6,484 / 6,530
SafariSafari
 — 99.88% 7,402 / 7,411 99.99% 25,450 / 25,453 — —
EdgeEdge
 100.0% 27,093 / 27,093 100.0% 309 / 309 — 100.0% 878 / 878 100.0% 55 / 55
FirefoxFirefox
 100.0% 7,814 / 7,814 100.0% 1,101 / 1,101 — 0.0% 0 / 18 99.54% 1,093 / 1,098