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Codec: avc1.421433

87.31% Encoder Support
280,132 of 320,842 sessions supported encoding
99.94% Decoder Support
269,756 of 269,915 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 320,842 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 144,507 / 144,755 99.91% 19,610 / 19,628 — 99.77% 63,352 / 63,501 99.12% 7,795 / 7,864
SafariSafari
 — 2.33% 201 / 8,619 1.53% 476 / 31,111 — —
EdgeEdge
 100.0% 30,928 / 30,928 99.72% 357 / 358 — 99.9% 958 / 959 100.0% 64 / 64
FirefoxFirefox
 95.9% 9,237 / 9,632 100.0% 1,263 / 1,263 — 0.0% 0 / 39 98.99% 1,276 / 1,289

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,915 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 122,369 / 122,402 99.89% 15,881 / 15,899 — 99.99% 53,606 / 53,612 99.33% 6,571 / 6,615
SafariSafari
 — 99.93% 7,216 / 7,221 99.99% 25,567 / 25,569 — —
EdgeEdge
 100.0% 27,001 / 27,001 100.0% 316 / 316 — 100.0% 877 / 877 100.0% 60 / 60
FirefoxFirefox
 99.97% 7,806 / 7,808 100.0% 1,036 / 1,036 — 0.0% 0 / 29 99.43% 1,050 / 1,056