Private by default
Camera previews, recordings, and key presses stay on your device.
Check what’s working.
Run a quick test, understand what it tells you, and find the next step when something is off.
Choose a test
Check your devices, or try a memory, reaction or typing challenge. Explore brain games
Webcam test
See the camera stream your browser receives.
Microphone test
Check whether sound reaches the browser.
Headphone test
Check left and right audio output.
Keyboard test
See which key events arrive in the page.
Mouse test
Check clicks, movement, and scroll.
Screen test
Inspect the panel with display patterns.
Touchscreen test
Trace touch coverage on a mobile screen.
Gamepad test
See the controller inputs your browser receives.
Reaction time test
Try a local visual click-response check.
Internet connection test
Read the browser’s current connection status.
QR code test
Scan a large QR code with another device.
Print test page
Inspect browser print preview before printing.
PDF test
Preview and download a small local PDF.
Sound test
Play simple local audio tones.
Image test
Inspect and download a local image pattern.
Movie test
Run a local moving image pattern.
Wi-Fi speed test
Measure a short route to this website.
Vibration test
Run a short vibration pattern when supported.
Gyroscope test
Observe device rotation values.
Accelerometer test
Observe live acceleration values.
Multi-touch test
Count simultaneous touch points.
Sequence memory test
Watch a pattern, then repeat it in order.
Aim test
Hit 20 targets and compare speed with accuracy.
Number memory test
Recall a number that grows by one digit.
Verbal memory test
Decide which words you have already seen.
Typing test
Measure typing speed and accuracy in one minute.
Visual memory test
Remember highlighted positions on a four-by-four grid.
Colour-word challenge
Choose the ink colour when the word disagrees.
Go / no-go test
Tap for circles and hold back for squares.
CPS / click speed test
Measure clicks per second in a timed run.
Double-click test
Inspect click intervals and unexpected rapid repeats.
Pitch detector
Find a sustained note, its frequency and tuning offset.
No tests match that search. Try “camera”, “mic”, or “keyboard”.
Get ready for your next call.
Check the three things that can hold up a meeting before it starts.
Built for a useful answer.
How our tests workClear about limits
Every tool explains what it can check—and what it cannot.
Next steps included
Practical troubleshooting is part of each test, not a separate search.