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Codec: avc1.421433

85.41% Encoder Support
53,561 of 62,708 sessions supported encoding
99.98% Decoder Support
11,800 of 11,802 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 62,708 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.75% 27,471 / 27,539 99.95% 4,373 / 4,375 — 99.67% 12,113 / 12,153 98.97% 1,629 / 1,646
SafariSafari
 — 2.91% 48 / 1,651 1.7% 118 / 6,948 — —
EdgeEdge
 100.0% 4,944 / 4,944 97.92% 47 / 48 — 100.0% 116 / 116 —
FirefoxFirefox
 95.19% 2,096 / 2,202 100.0% 272 / 272 — 0.0% 0 / 11 98.62% 286 / 290

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,802 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 100.0% 5,189 / 5,189 99.85% 645 / 646 — 100.0% 2,264 / 2,264 100.0% 397 / 397
SafariSafari
 — 100.0% 257 / 257 100.0% 1,420 / 1,420 — —
EdgeEdge
 100.0% 1,017 / 1,017 — — 100.0% 34 / 34 —
FirefoxFirefox
 100.0% 378 / 378 100.0% 45 / 45 — — 100.0% 57 / 57