Microphone, Camera and Speaker Tests
Before a call, an interview or a recording, two minutes of testing saves twenty minutes of apologising. These pages cover the whole chain in your browser: the microphone with a live level meter, a recording and playback; the camera with a live preview and its reported resolution and frame rate; and the speakers with channel tests and tones that tell you whether left is really left. Audio and video are processed locally with the browser's own APIs — nothing is uploaded, and recordings vanish when you close the page.
Mic Test
Check your microphone with a live level meter and playback.
Webcam Test
Check your camera, resolution and frame rate live.
Camera Test (Phone & Laptop)
Test front and rear cameras on a phone or laptop.
Speaker Test
Play test tones and check left, right and both channels.
Left / Right Speaker Test
Confirm the correct channel wiring in one pass.
Guides
How to Test Your Mouse
A five-minute routine that checks every button, the wheel and the sensor.
Why Is My Mouse Double-Clicking?
Chatter explained: why it happens and what actually fixes it.
How to Test Every Key on Your Keyboard
A systematic pass that finds dead, sticky and chattering keys.
How to Fix a Microphone That Is Not Working
A diagnosis order that finds the cause in a few minutes.
How to Check a Screen for Dead Pixels
A proper test procedure, plus how to document a defect.
How to Find Your Mouse DPI
Find or measure the DPI your mouse is actually running at.
What Is eDPI and cm/360?
The two numbers that actually describe a mouse setup.