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Codec: avc1.421028

99.71% Encoder Support
319,963 of 320,908 sessions supported encoding
99.93% Decoder Support
269,421 of 269,620 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 20 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,908 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.84% 144,051 / 144,282 99.88% 19,674 / 19,698 — 99.77% 63,532 / 63,681 98.81% 7,738 / 7,831
SafariSafari
 — 99.88% 8,612 / 8,622 99.99% 31,178 / 31,181 — —
EdgeEdge
 99.99% 30,977 / 30,979 100.0% 370 / 370 — 99.59% 975 / 979 98.53% 67 / 68
FirefoxFirefox
 96.26% 9,304 / 9,665 100.0% 1,380 / 1,380 — 0.0% 0 / 31 98.86% 1,303 / 1,318

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,620 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,702 / 121,733 99.85% 16,013 / 16,037 — 99.98% 53,744 / 53,753 98.9% 6,543 / 6,616
SafariSafari
 — 99.89% 7,219 / 7,227 99.99% 25,510 / 25,513 — —
EdgeEdge
 100.0% 26,933 / 26,934 100.0% 324 / 324 — 100.0% 895 / 895 100.0% 59 / 59
FirefoxFirefox
 100.0% 7,898 / 7,898 100.0% 1,133 / 1,133 — 0.0% 0 / 26 99.17% 1,069 / 1,078