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Codec: avc1.420c33

85.29% Encoder Support
53,689 of 62,947 sessions supported encoding
99.97% Decoder Support
11,900 of 11,903 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 62,947 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.77% 27,525 / 27,588 99.96% 4,472 / 4,474 — 99.76% 12,059 / 12,088 98.58% 1,530 / 1,552
SafariSafari
 — 2.29% 39 / 1,700 1.78% 125 / 7,040 — —
EdgeEdge
 99.98% 5,060 / 5,061 100.0% 46 / 46 — 100.0% 96 / 96 —
FirefoxFirefox
 95.31% 2,071 / 2,173 100.0% 303 / 303 — 0.0% 0 / 10 98.75% 315 / 319

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,903 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 5,154 / 5,155 100.0% 685 / 685 — 100.0% 2,239 / 2,239 99.74% 379 / 380
SafariSafari
 — 100.0% 291 / 291 100.0% 1,452 / 1,452 — —
EdgeEdge
 100.0% 1,084 / 1,084 — — 100.0% 28 / 28 —
FirefoxFirefox
 100.0% 379 / 379 100.0% 53 / 53 — — 100.0% 64 / 64