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Codec: avc1.420c1e

87.24% Encoder Support
280,224 of 321,206 sessions supported encoding
99.93% Decoder Support
269,549 of 269,734 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 3
Maximum Resolution SD/DVD (720×480)
Maximum Bitrate 10 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 321,206 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.82% 144,089 / 144,345 99.92% 19,658 / 19,673 — 99.78% 63,852 / 63,992 98.87% 7,605 / 7,692
SafariSafari
 — 1.89% 160 / 8,484 1.53% 483 / 31,524 — —
EdgeEdge
 100.0% 30,909 / 30,909 100.0% 347 / 347 — 99.68% 929 / 932 100.0% 68 / 68
FirefoxFirefox
 96.0% 9,405 / 9,797 100.0% 1,273 / 1,273 — 0.0% 0 / 36 98.68% 1,344 / 1,362

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,734 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,688 / 121,725 99.9% 15,979 / 15,995 — 99.98% 54,067 / 54,076 99.03% 6,433 / 6,496
SafariSafari
 — 99.9% 7,078 / 7,085 99.99% 25,780 / 25,783 — —
EdgeEdge
 100.0% 26,843 / 26,843 100.0% 317 / 317 — 100.0% 858 / 858 100.0% 60 / 60
FirefoxFirefox
 99.99% 7,945 / 7,946 100.0% 1,051 / 1,051 — 0.0% 0 / 26 99.27% 1,087 / 1,095