How to use Media codec support checker
Inspect advertised support for common video and audio formats without recording or playing media. The check runs when you submit the form. Its inputs are processed in this browser.
How the check works
Audio and video elements are asked canPlayType() for a fixed list of MIME types and codecs. MediaSource support is also checked when available.
The Overview tab explains the findings. Measured data lets you search individual fields and values, while JSON report shows the complete export. Export JSON to retain a baseline, or print the findings for your own records. Review the report before sharing it: browser characteristics, token claims, and file names can reveal information about your setup.
Read the result in context
The values probably, maybe and an empty response are browser hints. Container format, codec profile, bitrate and the actual file can still affect playback.
Understand the limits
No media is downloaded or decoded, and no microphone or camera is accessed. This is not a playback performance test.
Common questions
Where is the input processed?
In this browser tab. This tool does not submit its input to the site server or a third-party service.
What should I keep with a result?
Record the selected options, browser and time. Review exported values before sharing them. Generated passwords, tokens and HMAC secret keys are excluded from report exports.