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Codec: avc1.420832

85.44% Encoder Support
54,018 of 63,227 sessions supported encoding
99.94% Decoder Support
12,105 of 12,112 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5
Maximum Resolution 4K (4096×2176)
Maximum Bitrate 135 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 63,227 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.74% 27,788 / 27,860 99.93% 4,372 / 4,375 — 99.75% 12,211 / 12,242 98.89% 1,519 / 1,536
SafariSafari
 — 2.21% 36 / 1,629 1.87% 132 / 7,048 — —
EdgeEdge
 100.0% 5,061 / 5,061 100.0% 53 / 53 — 100.0% 111 / 111 90.0% 9 / 10
FirefoxFirefox
 95.46% 2,105 / 2,205 100.0% 277 / 277 — 0.0% 0 / 16 98.08% 306 / 312

VideoDecoder Support Matrix

Browser × Platform decoder support from 12,112 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 100.0% 5,299 / 5,299 99.72% 712 / 714 — 100.0% 2,275 / 2,275 99.19% 369 / 372
SafariSafari
 — 100.0% 268 / 268 100.0% 1,469 / 1,469 — —
EdgeEdge
 100.0% 1,023 / 1,023 — — 100.0% 37 / 37 —
FirefoxFirefox
 100.0% 447 / 447 100.0% 52 / 52 — — 100.0% 64 / 64