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Codec: avc1.421033

99.6% Encoder Support
62,488 of 62,741 sessions supported encoding
99.93% Decoder Support
11,638 of 11,646 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5.1
Maximum Resolution 8K (8192×4352)
Maximum Bitrate 240 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 62,741 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.71% 27,519 / 27,598 99.93% 4,396 / 4,399 — 99.67% 12,319 / 12,360 98.82% 1,594 / 1,613
SafariSafari
 — 99.87% 1,597 / 1,599 100.0% 6,898 / 6,898 — —
EdgeEdge
 99.98% 4,909 / 4,910 100.0% 47 / 47 — 100.0% 107 / 107 —
FirefoxFirefox
 95.7% 2,047 / 2,139 100.0% 273 / 273 — 0.0% 0 / 12 99.34% 302 / 304

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,646 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 5,140 / 5,141 99.7% 657 / 659 — 100.0% 2,227 / 2,227 98.97% 386 / 390
SafariSafari
 — 100.0% 262 / 262 100.0% 1,420 / 1,420 — —
EdgeEdge
 100.0% 997 / 997 — — 100.0% 24 / 24 —
FirefoxFirefox
 100.0% 350 / 350 100.0% 35 / 35 — — 100.0% 59 / 59