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Codec: avc1.420c1f

87.29% Encoder Support
279,567 of 320,258 sessions supported encoding
99.93% Decoder Support
268,872 of 269,062 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 3.1
Maximum Resolution HD ready (1024×960)
Maximum Bitrate 14 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,258 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.83% 143,483 / 143,724 99.91% 19,844 / 19,862 — 99.76% 63,540 / 63,690 98.86% 7,615 / 7,703
SafariSafari
 — 1.92% 162 / 8,450 1.56% 489 / 31,262 — —
EdgeEdge
 100.0% 31,038 / 31,039 100.0% 365 / 365 — 99.9% 1,027 / 1,028 100.0% 56 / 56
FirefoxFirefox
 96.03% 9,229 / 9,611 100.0% 1,327 / 1,327 — 0.0% 0 / 23 98.69% 1,280 / 1,297

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,062 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 120,910 / 120,950 99.89% 16,179 / 16,197 — 99.98% 53,872 / 53,881 98.99% 6,380 / 6,445
SafariSafari
 — 99.89% 7,106 / 7,114 99.98% 25,693 / 25,697 — —
EdgeEdge
 100.0% 27,080 / 27,081 100.0% 322 / 322 — 100.0% 944 / 944 100.0% 51 / 51
FirefoxFirefox
 100.0% 7,819 / 7,819 100.0% 1,085 / 1,085 — 0.0% 0 / 17 99.15% 1,050 / 1,059