← Back to Codec Support Table

Codec: avc1.421428

85.22% Encoder Support
53,490 of 62,770 sessions supported encoding
99.91% Decoder Support
12,016 of 12,027 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 4
Maximum Resolution 1080p (1920×1080)
Maximum Bitrate 20 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 62,770 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.75% 27,330 / 27,399 99.98% 4,310 / 4,311 — 99.86% 12,116 / 12,133 98.57% 1,585 / 1,608
SafariSafari
 — 2.63% 46 / 1,751 1.89% 133 / 7,049 — —
EdgeEdge
 100.0% 5,043 / 5,043 98.25% 56 / 57 — 100.0% 112 / 112 91.67% 11 / 12
FirefoxFirefox
 95.52% 2,111 / 2,210 100.0% 278 / 278 — — 99.06% 316 / 319

VideoDecoder Support Matrix

Browser × Platform decoder support from 12,027 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.94% 5,218 / 5,221 99.86% 693 / 694 — 100.0% 2,245 / 2,245 98.2% 382 / 389
SafariSafari
 — 100.0% 308 / 308 100.0% 1,461 / 1,461 — —
EdgeEdge
 100.0% 1,045 / 1,045 — — 100.0% 38 / 38 —
FirefoxFirefox
 100.0% 422 / 422 100.0% 49 / 49 — — 100.0% 61 / 61