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Codec: avc1.421028

99.64% Encoder Support
2,141,430 of 2,149,227 sessions supported encoding
99.81% Decoder Support
2,093,858 of 2,097,939 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 2,149,227 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,253 / 866,845 99.8% 100,406 / 100,603 — 99.5% 647,314 / 650,537 98.12% 43,153 / 43,979
SafariSafari
 — 99.74% 47,911 / 48,038 99.98% 218,475 / 218,521 — —
EdgeEdge
 99.99% 143,800 / 143,810 100.0% 1,475 / 1,475 — 99.81% 4,150 / 4,158 98.7% 684 / 693
FirefoxFirefox
 95.93% 51,314 / 53,490 99.96% 7,496 / 7,499 — 0.0% 0 / 115 98.66% 5,909 / 5,989

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,097,939 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,108 / 844,296 99.8% 96,749 / 96,942 — 99.65% 638,349 / 640,609 98.36% 42,063 / 42,764
SafariSafari
 — 99.81% 46,554 / 46,643 99.98% 212,807 / 212,853 — —
EdgeEdge
 99.99% 139,756 / 139,765 100.0% 1,429 / 1,429 — 100.0% 4,074 / 4,074 98.98% 677 / 684
FirefoxFirefox
 99.97% 51,707 / 51,723 99.94% 7,248 / 7,252 — 0.0% 0 / 110 98.54% 5,665 / 5,749