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Codec: avc1.421028

99.61% Encoder Support
62,935 of 63,183 sessions supported encoding
99.89% Decoder Support
11,902 of 11,915 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 63,183 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.74% 27,745 / 27,817 99.93% 4,325 / 4,328 — 99.7% 12,152 / 12,189 99.31% 1,584 / 1,595
SafariSafari
 — 99.88% 1,663 / 1,665 100.0% 7,041 / 7,041 — —
EdgeEdge
 99.98% 5,080 / 5,081 100.0% 55 / 55 — 100.0% 109 / 109 90.0% 9 / 10
FirefoxFirefox
 95.16% 2,083 / 2,189 100.0% 294 / 294 — — 99.66% 295 / 296

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,915 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.92% 5,264 / 5,268 99.7% 665 / 667 — 100.0% 2,261 / 2,261 99.21% 377 / 380
SafariSafari
 — 100.0% 276 / 276 100.0% 1,387 / 1,387 — —
EdgeEdge
 100.0% 1,036 / 1,036 — — 100.0% 25 / 25 —
FirefoxFirefox
 100.0% 422 / 422 100.0% 47 / 47 — — 100.0% 56 / 56