← Back to Codec Support Table

Codec: avc1.421032

99.63% Encoder Support
62,994 of 63,227 sessions supported encoding
99.95% Decoder Support
11,804 of 11,810 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5
Maximum Resolution 4K (4096×2176)
Maximum Bitrate 135 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 63,227 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.76% 27,772 / 27,840 99.98% 4,391 / 4,392 — 99.74% 12,245 / 12,277 98.68% 1,570 / 1,591
SafariSafari
 — 100.0% 1,678 / 1,678 100.0% 7,038 / 7,038 — —
EdgeEdge
 100.0% 5,083 / 5,083 100.0% 55 / 55 — 100.0% 119 / 119 —
FirefoxFirefox
 95.42% 2,040 / 2,138 100.0% 265 / 265 — — 98.86% 260 / 263

VideoDecoder Support Matrix

Browser × Platform decoder support from 11,810 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 100.0% 5,151 / 5,151 99.85% 660 / 661 — 100.0% 2,260 / 2,260 98.95% 376 / 380
SafariSafari
 — 100.0% 280 / 280 100.0% 1,412 / 1,412 — —
EdgeEdge
 100.0% 1,046 / 1,046 — — 100.0% 32 / 32 —
FirefoxFirefox
 100.0% 404 / 404 100.0% 45 / 45 — — 100.0% 53 / 53