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Codec: avc1.420c15

3.36% Encoder Support
72,262 of 2,150,812 sessions supported encoding
99.8% Decoder Support
2,095,776 of 2,099,908 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 2.1
Maximum Resolution SD (512×480)
Maximum Bitrate 4 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,150,812 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.03% 243 / 868,316 0.15% 152 / 100,768 — 0.3% 1,962 / 649,692 0.94% 412 / 44,005
SafariSafari
 — 1.58% 762 / 48,190 1.81% 3,952 / 218,537 — —
EdgeEdge
 0.02% 34 / 144,453 0.07% 1 / 1,498 — 0.0% 0 / 4,220 0.45% 3 / 665
FirefoxFirefox
 95.77% 51,176 / 53,439 99.91% 7,459 / 7,466 — 0.0% 0 / 105 97.98% 5,926 / 6,048

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,099,908 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 845,750 / 845,928 99.79% 96,942 / 97,143 — 99.65% 637,463 / 639,710 98.28% 42,081 / 42,816
SafariSafari
 — 99.84% 46,736 / 46,812 99.97% 212,920 / 212,974 — —
EdgeEdge
 100.0% 140,419 / 140,426 100.0% 1,470 / 1,470 — 100.0% 4,146 / 4,146 99.39% 657 / 661
FirefoxFirefox
 99.97% 51,668 / 51,684 99.96% 7,222 / 7,225 — 1.04% 1 / 96 98.35% 5,707 / 5,803