Use a steady white, warm or cool screen light with adjustable preview brightness and optional fullscreen.
Ready. Start explicitly to begin.
Start illuminates the preview. Brightness affects this page, not your device brightness.
This is a steady screen light, not the camera LED flashlight. Brightness changes the rendered preview through an overlay; it cannot set your device brightness. No flashing, wake lock or promise to prevent sleep. Fullscreen is optional. Stop, hidden tab or leaving switches off the light preview.
Reports contain the observations currently shown, not an automatic hardware health verdict. No report is uploaded or saved automatically.
These tools run locally and do not upload your device observations, camera video, microphone input or interaction events. There are no accounts or stored test histories. Camera and microphone access stays under browser permission controls.
This is a steady screen light, not the camera LED flashlight. Brightness changes the rendered preview through an overlay; it cannot set your device brightness. No flashing, wake lock or promise to prevent sleep. Fullscreen is optional. Stop, hidden tab or leaving switches off the light preview.
No. The browser exposes a limited set of events and reported settings. Inspect or listen to the actual result and compare with other applications if needed. Missing browser events or unavailable features do not prove a hardware failure.
Active input capture, audio playback and camera/microphone tracks are released on Stop, hidden tab, workspace switching and page exit. Pending permission results are ignored and late tracks stopped. Reports download only when explicitly chosen.
