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Codec: avc1.421034

99.63% Encoder Support
2,141,199 of 2,149,094 sessions supported encoding
99.8% Decoder Support
2,094,001 of 2,098,192 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 5.2
Maximum Resolution 8K (8192×4352)
Maximum Bitrate 240 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 2,149,094 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.93% 866,565 / 867,203 99.81% 100,432 / 100,623 — 99.5% 646,647 / 649,911 98.04% 43,313 / 44,179
SafariSafari
 — 99.74% 48,052 / 48,177 99.98% 218,678 / 218,732 — —
EdgeEdge
 99.99% 143,388 / 143,398 100.0% 1,470 / 1,470 — 99.88% 4,271 / 4,276 98.96% 666 / 673
FirefoxFirefox
 95.98% 51,307 / 53,454 99.97% 7,363 / 7,365 — 1.9% 2 / 105 98.91% 5,992 / 6,058

VideoDecoder Support Matrix

Browser × Platform decoder support from 2,098,192 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 844,609 / 844,795 99.8% 96,685 / 96,875 — 99.64% 637,672 / 639,999 98.32% 42,198 / 42,921
SafariSafari
 — 99.82% 46,687 / 46,771 99.97% 213,150 / 213,204 — —
EdgeEdge
 99.99% 139,517 / 139,526 100.0% 1,428 / 1,428 — 100.0% 4,203 / 4,203 99.1% 661 / 667
FirefoxFirefox
 99.97% 51,646 / 51,662 99.96% 7,152 / 7,155 — 2.0% 2 / 100 98.55% 5,729 / 5,813