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Codec: avc1.420c32

87.35% Encoder Support
1,875,055 of 2,146,533 sessions supported encoding
99.81% Decoder Support
2,091,692 of 2,095,757 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 2,146,533 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 865,867 / 866,463 99.81% 100,329 / 100,525 — 99.51% 646,608 / 649,787 98.07% 42,956 / 43,800
SafariSafari
 — 1.5% 719 / 48,014 1.87% 4,067 / 218,048 — —
EdgeEdge
 99.99% 143,179 / 143,188 99.93% 1,478 / 1,479 — 99.86% 4,230 / 4,236 98.4% 677 / 688
FirefoxFirefox
 95.91% 51,061 / 53,238 99.97% 7,480 / 7,482 — 0.0% 0 / 111 98.57% 5,936 / 6,022

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,095,757 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 843,929 / 844,095 99.8% 96,656 / 96,854 — 99.65% 637,692 / 639,920 98.35% 41,908 / 42,609
SafariSafari
 — 99.85% 46,596 / 46,665 99.98% 212,380 / 212,429 — —
EdgeEdge
 99.99% 139,271 / 139,280 100.0% 1,435 / 1,435 — 100.0% 4,167 / 4,167 98.68% 672 / 681
FirefoxFirefox
 99.97% 51,440 / 51,458 99.96% 7,236 / 7,239 — 0.0% 0 / 104 98.25% 5,685 / 5,786