No. The test only shows the local preview in the browser; no image is recorded or sent to a server. Clicking stop camera ends access.
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Test camera, resolution and stream locally
Before an important meeting or interview, it is worth confirming the camera works without walking into the call blind. This test requests the webcam with the getUserMedia API, shows the live preview, and reads the settings the video track reports: width, height (the resolution), the frame rate (FPS) and the facing mode (front or rear), when available. Everything happens locally, no image leaves your device. Because those values depend on hardware, driver and browser, the test also helps separate a camera problem from a permission or app problem.
The resolution shown is the mode the browser actually opened, not necessarily the camera's maximum. The browser picks a mode compatible with the constraints the page requests, so a webcam capable of 1080p may open at 720p if that is the negotiated mode. FPS is the stream's frame rate, and facing indicates the front camera (user) or rear (environment), useful on phones.
Access requires a secure context: the camera only opens over HTTPS or on localhost. Also, for privacy, browsers hide the device name until you grant permission, which is why the label may appear empty before the first "allow".
Example 1, before a video call: start the camera, confirm the preview looks sharp and the shutter is not closed, check that the resolution is what you expect (for example, 1280×720) and that FPS is stable. When done, use stop camera so the LED does not stay lit, a sign the camera is still active.
Example 2, validating a newly bought webcam: connect it, reload the page, and check that it appears in the device count and opens in the preview. If the resolution comes in below the advertised figure, the negotiated mode or the USB cable/port may be limiting bandwidth.
"Permission denied" means the site was blocked, reopen the padlock in the address bar and allow the camera. "The webcam is in use" (NotReadableError) almost always means another app (Zoom, Teams, OBS) grabbed the camera; close it and try again, since most systems give exclusive access to one program at a time.
"No webcam found" points to a disconnected camera, a hardware kill switch, or a missing driver. The message asking for HTTPS shows the page is not in a secure context. If the preview opens but stays black, check the physical privacy shutter and the camera permissions in the operating system.
These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
No. The test only shows the local preview in the browser; no image is recorded or sent to a server. Clicking stop camera ends access.
The test uses only the local stream; no image is uploaded.