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Codec: avc1.421432

87.33% Encoder Support
1,875,656 of 2,147,889 sessions supported encoding
99.8% Decoder Support
2,092,730 of 2,096,873 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 2,147,889 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,564 / 867,204 99.83% 100,363 / 100,538 — 99.5% 645,806 / 649,048 98.04% 42,879 / 43,737
SafariSafari
 — 1.58% 769 / 48,593 1.85% 4,045 / 218,083 — —
EdgeEdge
 99.99% 144,008 / 144,017 100.0% 1,443 / 1,443 — 99.85% 4,127 / 4,133 98.9% 716 / 724
FirefoxFirefox
 95.9% 51,123 / 53,306 99.93% 7,398 / 7,403 — 0.0% 0 / 121 98.59% 5,944 / 6,029

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,096,873 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,523 / 844,732 99.82% 96,660 / 96,833 — 99.64% 636,926 / 639,198 98.36% 41,810 / 42,509
SafariSafari
 — 99.84% 47,126 / 47,203 99.98% 212,410 / 212,460 — —
EdgeEdge
 99.99% 140,033 / 140,042 100.0% 1,398 / 1,398 — 100.0% 4,052 / 4,052 98.89% 713 / 721
FirefoxFirefox
 99.96% 51,547 / 51,567 99.93% 7,165 / 7,170 — 0.0% 0 / 115 98.41% 5,688 / 5,780