Online Hardware Tests for Keyboards, Mice, Gamepads and Monitors

Check a new or suspect peripheral before the return window closes: measure gamepad stick drift, find keyboard chatter and double typing, identify your keyboard layout, compare a mouse against its advertised DPI and polling rate, and cycle full-screen colors to spot dead or stuck pixels.

Each test reads input straight from the browser, so there is no driver or app to install. Results depend on what your browser exposes — the polling-rate test, for example, reports what the browser actually receives — and every page explains those limits next to the numbers. They are handy when buying second-hand gear or deciding whether a fault is worth a warranty claim.

• Gamepad Tester — Full controller diagnostic: buttons, stick drift, triggers, rumble, health certificate.
• Mouse Polling Rate & Jitter Studio — Measure browser-observed mouse event rates and timing variation, with live intervals and jitter charts.
• Mouse DPI & CPI Accuracy Tester — Measure real pointer counts over a ruler distance, compare advertised DPI, and repeat calibration runs in your browser.
• Monitor & Dead Pixel Tester — Inspect solid colors, grayscale, gradients, and geometry grids in a distraction-free full-screen display test.
• Keyboard Chatter & Switch Tester — Detect duplicate key presses, rapid switch chatter, stuck keys and keyboard rollover locally.
• Keyboard Layout Detector — Identify the exact keyboard layout your laptop or keyboard uses (e.g. "English (United States)", "French (Legacy, AZERTY)", "German (IBM)") and what your typed text's language is.

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