Input devices
Check every key, click, scroll and stick. These tests read the raw events your browser receives, so you see exactly what your device sends.
- Keyboard TestFree online keyboard tester. Press keys to see them light up, find dead or sticky keys, check N-key rollover and ghosting, and read key codes. No download. Open tool
- Mouse TestTest all mouse buttons online: left, right, middle, back and forward side buttons, scroll up and down, and double-clicks. Instant, free and private. Open tool
- Double-Click TestFind out if your mouse double-clicks when you single-click. Measures the gap between clicks and flags switch chatter from worn Omron or Kailh switches. Open tool
- Polling Rate TestMeasure your mouse polling rate in Hz online. Check whether your gaming mouse really reports at 125, 500, 1000, 4000 or 8000 Hz, with a live graph. Open tool
- Click Speed TestTest how fast you can click. Measure clicks per second (CPS) over 1, 5, 10, 30 or 60 seconds and track your best score. Free CPS tester. Open tool
- Mouse DPI TestFind your mouse's actual DPI (CPI). Move the mouse a known distance and the tool calculates DPI from raw movement counts. Check accuracy of DPI settings. Open tool
- Scroll Wheel TestCheck whether your mouse scroll wheel jumps, skips or scrolls the wrong way. Counts steps up and down and flags reversed events from a worn encoder. Open tool
- Gamepad TestTest your Xbox, PlayStation, Switch Pro or PC controller online. See every button, analog trigger pressure and stick position, and measure stick drift. Open tool
- Touchscreen TestTest your touchscreen online. Draw with several fingers to check multi-touch, and use the grid mode to find dead zones on phones, tablets and laptops. Open tool
- Stylus & Pen TestTest your stylus or drawing tablet pen online: pressure sensitivity, tilt, rotation, eraser and barrel buttons. Works with Apple Pencil, S Pen, Surface Pen and Wacom. Open tool
- Typing Speed TestFree typing speed test. Type common words for 15, 30, 60 or 120 seconds and get your words per minute (WPM), characters per minute and accuracy. No sign-up. Open tool
- Reaction Time TestFree reaction time test. Wait for the screen to turn green and click as fast as you can. Five rounds give your average and fastest time in milliseconds. Open tool
Fix guides
- Keyboard Not Working? Fix Unresponsive Keys and Wrong LayoutFix a keyboard with keys that do not respond, type the wrong characters or lag. Covers cleaning, Filter Keys, layout, drivers and wireless issues.
- Mouse Double-Clicking on Single Click? How to Fix ItFix a mouse that double-clicks when you click once. Test for switch chatter, adjust debounce, clean the switch and check Windows double-click settings.
- Controller Stick Drift: How to Test and Fix ItTest your Xbox, PlayStation or Switch controller for stick drift, then fix it with calibration, dead zones, cleaning or stick replacement.
- Touchscreen Not Responding? Fix Ghost Touches and Dead ZonesFix a touchscreen that does not respond, has dead zones or registers ghost touches on phones, tablets and laptops. Cleaning, calibration and driver steps.
- Mouse Lagging or Stuttering? How to Get Smooth TrackingFix a mouse that lags, stutters or jumps. Check polling rate, wireless interference, surface, USB power saving and drivers with a quick test.