How it works
The test uses getUserMedia from the W3C Media Capture and Streams standard to open your camera and microphone, shows the live picture, and reads the settings the browser actually applied: resolution, frame rate, aspect ratio, sample rate and whether echo cancellation, noise suppression and automatic gain are on.
The level meter measures the microphone signal in dBFS (decibels below full scale) through the Web Audio API, with a peak marker. The frame rate is counted from the frames the video element really receives. The 5-second clip is recorded with MediaRecorder into memory so you can check sound and picture together; it is never sent anywhere.
What to check
- Picture: sharp, well lit, not too dark or grainy, and the right camera is selected.
- Resolution and frame rate: 720p or 1080p at 25–30 fps is typical for video calls.
- Mic level: speaking normally should move the bar into the middle; touching the red end means it is too loud or too close.
- Clip: your voice should be clear, without echo or a robotic sound, and in sync with your lips.
If something does not work
- Blocked: allow camera and microphone for this site in the browser’s address bar or site settings.
- Black picture or busy device: close other apps that use the camera, such as video-call or recording software.
- Wrong device: pick the right camera or microphone in the lists above (names appear after permission is granted).
- On a laptop, check for a privacy shutter, a camera key or a system privacy setting that turns the camera off.
Tips
- Test in the same browser you use for your meetings, because permissions are stored per browser and per site.
- The requested resolution is a wish: the camera picks the closest mode it supports, shown under Resolution.
- Turn off mirroring to see the picture the way others see it in a call.
Standards and sources
- Media Capture and Streams (getUserMedia) · W3C
- MediaStream Recording (MediaRecorder) · W3C
- MediaDevices.getUserMedia() · MDN Web Docs
- MediaStreamTrack.getSettings() · MDN Web Docs
Last reviewed October 18, 2026
Frequently asked questions
Is my video or audio uploaded?
No. The preview, the measurements and the test clip are processed only in your browser. Nothing is sent to beancuit or anyone else, and the clip disappears when you close or reload the page.
Why does my 1080p camera show 720p?
Browsers start with a modest default. Choose 1920 × 1080 under Requested resolution; if it still shows less, the camera, cable or USB port may not support that mode, or another app is limiting it.
Why are the device names empty?
Browsers only reveal camera and microphone names after you grant permission. Press Start test and allow access, then the lists fill in.
The mic meter does not move. What now?
Check that the right microphone is selected, that it is not muted with a hardware switch, and that the system input level is not at zero. Then speak close to it.