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Codec: avc1.421015

18.79% Encoder Support
11,823 of 62,909 sessions supported encoding
99.94% Decoder Support
11,809 of 11,816 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 62,909 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.03% 9 / 27,611 0.25% 11 / 4,380 — 0.15% 19 / 12,271 0.83% 13 / 1,559
SafariSafari
 — 99.88% 1,653 / 1,655 99.99% 6,965 / 6,966 — —
EdgeEdge
 0.0% 0 / 4,983 0.0% 0 / 54 — 0.0% 0 / 120 —
FirefoxFirefox
 94.92% 2,076 / 2,187 100.0% 282 / 282 — — 99.03% 305 / 308

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,816 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.94% 5,207 / 5,210 99.71% 687 / 689 — 100.0% 2,199 / 2,199 99.74% 381 / 382
SafariSafari
 — 100.0% 261 / 261 100.0% 1,388 / 1,388 — —
EdgeEdge
 100.0% 1,052 / 1,052 100.0% 10 / 10 — 100.0% 39 / 39 —
FirefoxFirefox
 100.0% 409 / 409 100.0% 41 / 41 — — 100.0% 55 / 55