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Codec: avc1.420c32

85.41% Encoder Support
53,457 of 62,591 sessions supported encoding
99.95% Decoder Support
11,838 of 11,844 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 62,591 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.73% 27,490 / 27,565 99.95% 4,329 / 4,331 — 99.74% 12,089 / 12,120 98.74% 1,573 / 1,593
SafariSafari
 — 2.09% 34 / 1,625 1.89% 132 / 6,979 — —
EdgeEdge
 100.0% 4,941 / 4,941 98.15% 53 / 54 — 100.0% 99 / 99 100.0% 10 / 10
FirefoxFirefox
 94.75% 2,075 / 2,190 100.0% 296 / 296 — — 98.31% 290 / 295

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,844 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 5,199 / 5,200 99.85% 659 / 660 — 100.0% 2,253 / 2,253 99.5% 400 / 402
SafariSafari
 — 100.0% 281 / 281 100.0% 1,381 / 1,381 — —
EdgeEdge
 100.0% 1,033 / 1,033 100.0% 10 / 10 — 100.0% 30 / 30 —
FirefoxFirefox
 100.0% 410 / 410 100.0% 53 / 53 — — 100.0% 59 / 59