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Codec: avc1.421032

99.71% Encoder Support
320,923 of 321,866 sessions supported encoding
99.93% Decoder Support
270,248 of 270,428 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 321,866 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 144,380 / 144,625 99.9% 19,603 / 19,622 — 99.78% 63,935 / 64,079 98.94% 7,625 / 7,707
SafariSafari
 — 99.91% 8,638 / 8,646 99.99% 31,574 / 31,578 — —
EdgeEdge
 100.0% 31,125 / 31,125 100.0% 338 / 338 — 99.9% 970 / 971 95.24% 60 / 63
FirefoxFirefox
 96.18% 9,307 / 9,677 100.0% 1,317 / 1,317 — 0.0% 0 / 36 98.82% 1,261 / 1,276

VideoDecoder Support Matrix

Browser × Platform decoder support from 270,428 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,895 / 121,934 99.87% 15,871 / 15,891 — 99.99% 54,057 / 54,062 99.17% 6,442 / 6,496
SafariSafari
 — 99.89% 7,237 / 7,245 99.98% 25,932 / 25,936 — —
EdgeEdge
 100.0% 27,088 / 27,088 100.0% 291 / 291 — 100.0% 884 / 884 96.49% 55 / 57
FirefoxFirefox
 99.99% 7,942 / 7,943 100.0% 1,097 / 1,097 — 0.0% 0 / 29 99.44% 1,060 / 1,066