TESTING GUIDE

How Webcam Testing Works

A browser webcam test is a permission-controlled MediaStream check. It can show what a browser page currently receives from a video-input device, but it cannot honestly turn that observation into a complete hardware certification.

Permission and secure context

Camera access starts only after an explicit user action. Modern browsers require a secure context and user permission before a page can receive a camera stream.

Video tracks and camera selection

The browser returns a MediaStream containing a video track. After permission, the browser may expose additional video-input labels through its device list. Switching cameras requests a new video track for the selected device.

Resolution

Width and height describe the current stream delivered to the video element. Stream negotiation, browser defaults, camera capabilities, and system conditions can affect the active dimensions, so current resolution is not the same thing as a guaranteed maximum camera specification.

Reported FPS

The active track can expose a configured frame-rate setting. Webcam Test labels this value Reported FPS because it comes from browser track settings rather than from a direct sensor measurement.

Presented FPS

When the browser exposes video-frame callbacks, Webcam Test estimates how frequently frames are presented to this page over a rolling window. Presented FPS can differ from Reported FPS because browser scheduling and display presentation are part of the observed path.

Facing mode

Some browsers report whether a track is oriented toward the user or environment. The exact labels and device information exposed vary by browser and hardware, so missing values are shown as unavailable rather than inferred.

What mirror mode changes

Mirroring is a CSS transformation of the local preview. It does not rewrite the underlying video track and does not configure another application.

Privacy

Webcam Test requests video only. It does not record, save, or upload the camera stream, and it does not request microphone access.

What a browser webcam test cannot prove

It cannot certify lens sharpness, calibrated color, low-light performance, camera firmware, maximum sensor capability, or another application's selected device and permissions.