Category · 10 tools
Peripherals & Input Testing
Check the things you type, click, tap and talk into, using the browser you already have open. Nothing is recorded, and nothing you press or type leaves your device.
Keyboard and mouse
The two devices that fail most often, and the timing checks that show how.
- Keyboard TesterPress every key and watch it light up, including the ones your system takes first.FindsKeys that do not register · stuck keys · rollover limits
- Mouse TesterButtons, wheel direction and the time between clicks, as the browser receives them.FindsButton and wheel faults · double-click timing
- Double Click TestCounts the presses that arrive from one deliberate click, and lists the intervals.FindsExtra clicks from one press
- Click Speed Test (CPS)Counts your clicks over a timed run. A measure of you, not of the mouse.FindsYour clicks per second over a timed run
Touch, trackpad and pen
Pointer tests for a touchscreen, a trackpad and a stylus.
- Touchscreen TestA grid that fills in as you touch it, for finding dead zones and stray touches.FindsDead zones · ghost touches · multi-touch count
- Trackpad TestMovement, buttons, scrolling and pinch gestures, as the browser reports them.FindsMovement · buttons · scroll and pinch gestures
- Stylus / Pen Pressure TestA canvas that draws with pen pressure and tilt, and says plainly when a pen reports neither.FindsPressure · tilt · what the pen reports
Camera, microphone and controllers
These ask your browser for permission first, or need a device plugged in.
- Webcam TestAsks permissionA live preview that starts only when you press the button, with what the browser reports about the stream.FindsCamera working · what the browser reports
- Microphone TestAsks permissionA level meter and waveform that start only when you press the button. Nothing is recorded.FindsMicrophone picking up sound · input level
- Gamepad / Controller TesterController neededButtons, sticks and triggers on a connected controller, read while the page is open.FindsButtons · sticks · triggers
Guides for these tools
What a result means, and what to do next.
- ExplainerThe Mouse Double-Click ProblemWhy a mouse sends two clicks for one press, how to tell a failing switch from a setting, and what the makers tell you to try before replacing it.
- ExplainerKeyboard Keys Not WorkingA key that does nothing, a key that repeats, or keys that vanish when you hold several at once. How to tell which one you have, and what to do about each.
- ExplainerVideo Call Setup: Camera, Light, MicA practical order for setting up a video call: where the light goes, what the camera is actually sending, and how to tell a muted microphone from a broken one.