Webcam Test
Start a private live preview only after clicking the button, then inspect the active stream and capture an optional in-memory snapshot.
Open test →CMWebcam Resolution Test
Request a camera stream and compare requested dimensions with the actual video width and height delivered by the browser.
Open test →CMWebcam FPS Test
Estimate delivered webcam frames per second from a live browser stream after explicit permission.
Open test →CMMicrophone Test
Visualize microphone volume, waveform, frequency energy and clipping locally with the Web Audio API.
Open test →CMMicrophone Playback Test
Record up to ten seconds in browser memory and play it back locally, with no upload or automatic saving.
Open test →CMBrowser Permission Checker
Review the browser-visible state of camera and microphone permissions without requesting access on page load.
Open test →What these browser tests can tell you
These tools show events, streams and capability values made available by your browser. They are useful for reproducing a problem and comparing behavior, but they do not certify a component or replace repair diagnostics.
Run a test more than once and, when practical, compare another current browser, port, cable or device. Each tool page gives a more specific interpretation and troubleshooting sequence.