← Back to Codec Support Table

Codec: mp4a.40.29

90.1% Encoder Support
1,029,427 of 1,142,531 sessions supported encoding
96.42% Decoder Support
926,210 of 960,564 sessions supported decoding

VideoEncoder Support Matrix

Browser × Platform encoder support from 1,142,531 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.69% 512,051 / 513,662 99.69% 69,998 / 70,214 — 96.89% 219,830 / 226,887 47.67% 13,173 / 27,633
SafariSafari
 — 65.54% 20,026 / 30,556 69.99% 77,944 / 111,368 — —
EdgeEdge
 99.71% 109,993 / 110,311 100.0% 1,311 / 1,311 — 98.58% 3,401 / 3,450 1.35% 3 / 222
FirefoxFirefox
 0.03% 12 / 34,620 0.02% 1 / 4,698 — 0.0% 0 / 120 0.09% 4 / 4,620

VideoDecoder Support Matrix

Browser × Platform decoder support from 960,564 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.97% 433,438 / 433,560 99.89% 57,053 / 57,116 — 99.99% 191,423 / 191,434 99.24% 23,175 / 23,352
SafariSafari
 — 68.01% 17,445 / 25,652 72.36% 66,125 / 91,388 — —
EdgeEdge
 100.0% 96,106 / 96,108 100.0% 1,162 / 1,162 — 100.0% 3,177 / 3,177 99.0% 198 / 200
FirefoxFirefox
 99.98% 28,273 / 28,279 100.0% 3,868 / 3,868 — 0.0% 0 / 88 99.23% 3,755 / 3,784