Use the webcam tool below to confirm whether the browser can see your camera, show a preview, and read device information.
Webcam Preview
Click "Start Webcam" to begin testing
Webcam Tester is a free, browser-based webcam testing tool that lets you check browser access, live preview, and camera detection when your webcam is not working.
A webcam can fail for several different reasons: blocked browser permission, the wrong camera being selected, another app holding the camera open, or a hardware problem. This page helps you narrow that down with a live browser test.
If you only need to verify the camera resolution instead of troubleshooting a failure, use the camera resolution test.
The most common causes are denied permission, privacy settings in the operating system, another program already using the webcam, or selecting the wrong device when multiple cameras exist. External webcams can also fail because of loose USB connections or a bad cable.
If the live preview appears and the browser shows your camera information, the webcam is working at the browser level.
A black preview can happen when another app is using the camera, permission is blocked, or the webcam has a connection or hardware problem.
That usually points to an app-specific issue, such as the wrong camera selection, disabled permission inside the app, or virtual camera conflicts.
