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Codec: avc1.420c28

87.23% Encoder Support
278,958 of 319,799 sessions supported encoding
99.94% Decoder Support
268,716 of 268,890 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 319,799 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.84% 143,773 / 143,999 99.91% 19,703 / 19,720 — 99.77% 63,255 / 63,400 98.86% 7,569 / 7,656
SafariSafari
 — 1.99% 171 / 8,594 1.46% 457 / 31,239 — —
EdgeEdge
 100.0% 30,745 / 30,745 100.0% 361 / 361 — 99.79% 932 / 934 98.46% 64 / 65
FirefoxFirefox
 96.03% 9,253 / 9,636 100.0% 1,319 / 1,319 — 0.0% 0 / 27 98.35% 1,249 / 1,270

VideoDecoder Support Matrix

Browser × Platform decoder support from 268,890 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 121,496 / 121,524 99.89% 15,993 / 16,011 — 99.99% 53,506 / 53,514 98.99% 6,438 / 6,504
SafariSafari
 — 99.94% 7,234 / 7,238 99.99% 25,661 / 25,664 — —
EdgeEdge
 100.0% 26,782 / 26,782 100.0% 325 / 325 — 100.0% 860 / 860 100.0% 58 / 58
FirefoxFirefox
 100.0% 7,841 / 7,841 100.0% 1,086 / 1,086 — 0.0% 0 / 19 99.23% 1,025 / 1,033