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Codec: avc1.421015

15.67% Encoder Support
336,458 of 2,147,665 sessions supported encoding
99.81% Decoder Support
2,092,519 of 2,096,549 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 2,147,665 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.03% 236 / 866,992 0.16% 158 / 100,558 — 0.3% 1,959 / 649,420 0.87% 379 / 43,801
SafariSafari
 — 99.75% 48,060 / 48,180 99.97% 217,994 / 218,069 — —
EdgeEdge
 0.02% 32 / 143,757 0.07% 1 / 1,404 — 0.0% 0 / 4,189 0.31% 2 / 651
FirefoxFirefox
 96.05% 51,483 / 53,599 99.96% 7,452 / 7,455 — 0.0% 0 / 107 97.87% 5,924 / 6,053

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,549 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,390 / 844,591 99.79% 96,665 / 96,867 — 99.65% 637,102 / 639,348 98.4% 41,942 / 42,624
SafariSafari
 — 99.84% 46,707 / 46,782 99.98% 212,424 / 212,473 — —
EdgeEdge
 99.99% 139,817 / 139,826 100.0% 1,360 / 1,360 — 100.0% 4,108 / 4,108 98.92% 640 / 647
FirefoxFirefox
 99.97% 51,804 / 51,821 99.96% 7,211 / 7,214 — 0.0% 0 / 100 98.5% 5,712 / 5,799