How to Use FreeDeviceTest

Step-by-step guide for each device test tool.

Webcam Test

1Open the Microphone Test from the navigation bar.
2Click 'Start Test' and allow browser access to your microphone.
3Watch the real-time waveform visualization and volume level meter.
4The status indicator shows whether your mic is detected and working.
5Click 'Record' to capture a 10-second audio sample, then use 'Playback' to listen.
6Use the device selector to switch between multiple microphones if available.

1Open the Keyboard Tester from the navigation bar.
2Press any key on your physical keyboard to see it highlighted on the virtual layout.
3View the key code, key name, and code properties displayed below.
4Press multiple keys simultaneously to test anti-ghosting and see rollover count.
5The pressed keys counter tracks how many unique keys you have tested.
6Click 'Reset' to clear all highlights and start fresh.

1Open the Vision Test from the navigation bar.
2Use the Snellen chart in a well-lit room and sit at the suggested viewing distance.
3Test one eye at a time and note the smallest row you can read clearly.
4Run the colour vision, astigmatism, and contrast checks as quick screening tools.
5Treat results as guidance only, not a medical diagnosis.
6Book a professional eye exam if you notice blurred vision, eye strain, or repeated failed checks.

1Make sure your browser has permission to access camera and microphone (check browser settings).
2For the best webcam test results, ensure adequate lighting in your environment.
3If no devices are detected, check that they are properly connected and not in use by another app.
4The speaker test works best with headphones to isolate left and right channels.
5For accurate CPS results, use a stable surface and a responsive mouse.
6All tests work on desktop, tablet, and mobile browsers.

Step-by-step guide for each device test tool.

1Open the Microphone Test from the navigation bar.
2Click 'Start Test' and allow browser access to your microphone.
3Watch the real-time waveform visualization and volume level meter.
4The status indicator shows whether your mic is detected and working.
5Click 'Record' to capture a 10-second audio sample, then use 'Playback' to listen.
6Use the device selector to switch between multiple microphones if available.

1Open the Keyboard Tester from the navigation bar.
2Press any key on your physical keyboard to see it highlighted on the virtual layout.
3View the key code, key name, and code properties displayed below.
4Press multiple keys simultaneously to test anti-ghosting and see rollover count.
5The pressed keys counter tracks how many unique keys you have tested.
6Click 'Reset' to clear all highlights and start fresh.

1Open the Vision Test from the navigation bar.
2Use the Snellen chart in a well-lit room and sit at the suggested viewing distance.
3Test one eye at a time and note the smallest row you can read clearly.
4Run the colour vision, astigmatism, and contrast checks as quick screening tools.
5Treat results as guidance only, not a medical diagnosis.
6Book a professional eye exam if you notice blurred vision, eye strain, or repeated failed checks.

1Make sure your browser has permission to access camera and microphone (check browser settings).
2For the best webcam test results, ensure adequate lighting in your environment.
3If no devices are detected, check that they are properly connected and not in use by another app.
4The speaker test works best with headphones to isolate left and right channels.
5For accurate CPS results, use a stable surface and a responsive mouse.
6All tests work on desktop, tablet, and mobile browsers.