← Back to Codec Support Table

Codec: avc1.421029

99.64% Encoder Support
2,141,776 of 2,149,590 sessions supported encoding
99.81% Decoder Support
2,094,245 of 2,098,327 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4.1
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 50 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,149,590 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 867,210 / 867,831 99.81% 100,220 / 100,411 — 99.5% 646,200 / 649,430 98.14% 43,202 / 44,019
SafariSafari
 — 99.77% 48,040 / 48,152 99.98% 218,636 / 218,684 — —
EdgeEdge
 99.99% 143,530 / 143,540 100.0% 1,435 / 1,435 — 99.79% 4,258 / 4,267 99.06% 635 / 641
FirefoxFirefox
 95.97% 51,826 / 54,002 99.99% 7,507 / 7,508 — 0.0% 0 / 104 98.87% 6,013 / 6,082

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,098,327 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 845,049 / 845,241 99.8% 96,503 / 96,692 — 99.64% 637,257 / 639,533 98.42% 42,091 / 42,768
SafariSafari
 — 99.84% 46,726 / 46,800 99.98% 212,955 / 213,003 — —
EdgeEdge
 99.99% 139,508 / 139,518 100.0% 1,391 / 1,391 — 100.0% 4,186 / 4,186 99.21% 630 / 635
FirefoxFirefox
 99.98% 52,226 / 52,239 99.96% 7,274 / 7,277 — 0.0% 0 / 101 98.62% 5,780 / 5,861