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Codec: avc1.421020

99.7% Encoder Support
319,397 of 320,368 sessions supported encoding
99.93% Decoder Support
269,333 of 269,521 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 3.2
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 20 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,368 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 143,920 / 144,158 99.91% 19,749 / 19,766 — 99.77% 63,575 / 63,724 98.78% 7,691 / 7,786
SafariSafari
 — 99.94% 8,625 / 8,630 100.0% 30,740 / 30,741 — —
EdgeEdge
 100.0% 30,936 / 30,936 100.0% 382 / 382 — 99.71% 1,029 / 1,032 98.39% 61 / 62
FirefoxFirefox
 95.92% 9,342 / 9,739 100.0% 1,273 / 1,273 — 0.0% 0 / 29 98.77% 1,281 / 1,297

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,521 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,800 / 121,839 99.89% 16,034 / 16,051 — 99.99% 53,659 / 53,665 98.85% 6,507 / 6,583
SafariSafari
 — 99.93% 7,219 / 7,224 100.0% 25,342 / 25,343 — —
EdgeEdge
 100.0% 27,015 / 27,015 100.0% 337 / 337 — 100.0% 952 / 952 98.25% 56 / 57
FirefoxFirefox
 100.0% 7,938 / 7,938 100.0% 1,054 / 1,054 — 0.0% 0 / 16 99.04% 1,037 / 1,047