Keyboard & Mouse Tools
Inspect keys, clicks, pointer events, timing estimates, typing, and input behavior.
Keyboard Test
See keydown and keyup events, pressed keys, locations, and tested codes.
NKRO Keyboard Test
Observe simultaneous keys and the maximum combination your browser receives.
Keyboard Chatter Test
Look for unusually close repeated keydown events while excluding held-key repeats.
Keyboard Latency Test
Estimate time from a browser key event to the next painted visual update.
Typing Speed Test
Measure English typing speed, raw speed, accuracy, and error characters.
Mouse Test
Inspect primary, middle, and side buttons, wheel input, coordinates, and motion.
Mouse Double Click Test
Review click intervals and possible unexpectedly close repeat clicks.
Mouse Polling Rate Test
Estimate the pointer event rate currently delivered to this browser tab.
Mouse DPI Calculator
Estimate mouse DPI from on-screen pixels and a measured physical movement.
CPS Test
Measure clicks per second over a fixed one to sixty second session.
Reaction Time Test
Measure visual response timing over five randomized browser rounds.
What the browser can tell you
These tools report browser events, exposed settings, local measurements, or your own observations. They do not silently convert those signals into a hardware health score.
Each tool page lists its method, limitations, privacy behavior, and the most useful next troubleshooting step.