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Codec: avc1.420c15

4.56% Encoder Support
2,856 of 62,680 sessions supported encoding
99.94% Decoder Support
11,791 of 11,798 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 2.1
Maximum Resolution SD (512×480)
Maximum Bitrate 4 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 62,680 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.02% 6 / 27,605 0.21% 9 / 4,284 — 0.13% 16 / 12,194 0.75% 12 / 1,598
SafariSafari
 — 2.31% 38 / 1,648 1.88% 130 / 6,922 — —
EdgeEdge
 0.0% 0 / 5,070 0.0% 0 / 37 — 0.0% 0 / 102 —
FirefoxFirefox
 95.49% 2,053 / 2,150 99.64% 280 / 281 — 0.0% 0 / 11 99.01% 300 / 303

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,798 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 5,217 / 5,218 99.54% 656 / 659 — 100.0% 2,212 / 2,212 99.76% 408 / 409
SafariSafari
 — 100.0% 276 / 276 100.0% 1,374 / 1,374 — —
EdgeEdge
 100.0% 1,043 / 1,043 — — 100.0% 28 / 28 —
FirefoxFirefox
 100.0% 395 / 395 100.0% 40 / 40 — — 100.0% 58 / 58