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Codec: avc1.421015

16.34% Encoder Support
52,243 of 319,721 sessions supported encoding
99.94% Decoder Support
268,452 of 268,606 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 319,721 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.03% 42 / 143,421 0.17% 33 / 19,783 — 0.13% 83 / 63,846 0.74% 57 / 7,671
SafariSafari
 — 99.88% 8,564 / 8,574 99.95% 30,971 / 30,986 — —
EdgeEdge
 0.01% 4 / 31,036 0.0% 0 / 364 — 0.0% 0 / 981 0.0% 0 / 67
FirefoxFirefox
 96.2% 9,225 / 9,589 100.0% 1,287 / 1,287 — 0.0% 0 / 30 98.04% 1,252 / 1,277

VideoDecoder Support Matrix

Browser × Platform decoder support from 268,606 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 120,992 / 121,020 99.89% 16,074 / 16,092 — 99.99% 53,769 / 53,774 99.23% 6,444 / 6,494
SafariSafari
 — 99.9% 7,169 / 7,176 99.99% 25,387 / 25,390 — —
EdgeEdge
 100.0% 27,104 / 27,105 100.0% 320 / 320 — 100.0% 900 / 900 100.0% 63 / 63
FirefoxFirefox
 100.0% 7,811 / 7,811 100.0% 1,046 / 1,046 — 0.0% 0 / 23 99.32% 1,017 / 1,024