Codec support in this browser
This page asks the browser which video and audio formats it can play, through each media API a web page can use. The page does not play any video. The playback test on the Test page confirms the answers with real video.
Answers for each format
Each row shows what the browser reported for one codec string. A row marked with a warning has answers that disagree with each other. When the answers disagree, the playback test shows which answer is right.
The page is asking the browser about each format.
HEVC by resolution and frame rate
Each cell shows the Media Capabilities answer for an HEVC file at that size and frame rate. A browser reports power efficient decoding when the graphics hardware would decode the video. Firefox does not report it reliably.
The page is asking the browser about each size and frame rate.
Check a codec string
Enter a codec string to see what this browser reports for it. The page address includes the string. You can send the link to someone else to check the same string in their browser.
This device
These are the details the page read from the browser. The report from the playback test includes the same details.