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Codec: avc1.421033

99.71% Encoder Support
318,961 of 319,903 sessions supported encoding
99.93% Decoder Support
268,604 of 268,783 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 319,903 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 143,882 / 144,131 99.91% 19,608 / 19,625 — 99.76% 63,924 / 64,078 99.04% 7,699 / 7,774
SafariSafari
 — 99.94% 8,434 / 8,439 99.99% 30,911 / 30,913 — —
EdgeEdge
 99.99% 30,495 / 30,497 100.0% 355 / 355 — 99.69% 960 / 963 98.33% 59 / 60
FirefoxFirefox
 96.2% 9,270 / 9,636 100.0% 1,299 / 1,299 — 0.0% 0 / 38 99.07% 1,284 / 1,296

VideoDecoder Support Matrix

Browser × Platform decoder support from 268,783 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 121,633 / 121,671 99.89% 15,868 / 15,885 — 99.99% 53,938 / 53,945 99.1% 6,492 / 6,551
SafariSafari
 — 99.96% 7,093 / 7,096 99.99% 25,417 / 25,419 — —
EdgeEdge
 100.0% 26,583 / 26,584 100.0% 312 / 312 — 100.0% 880 / 880 98.11% 52 / 53
FirefoxFirefox
 99.99% 7,846 / 7,847 100.0% 1,061 / 1,061 — 0.0% 0 / 27 99.33% 1,044 / 1,051