Keyboard Test Online

Press each key on your keyboard. The visual layout highlights every key in real time. Keys stay highlighted after release so you can track progress. If a key doesn't highlight when pressed, it may have a faulty switch (mechanical), worn contact pad (membrane), or a firmware issue. The progress bar shows how many of the standard layout keys you've tested.

Ghosting occurs when pressing certain key combinations causes phantom key registrations — keys you didn't press appear highlighted. This is a hardware limitation of the keyboard's wiring matrix. Test by pressing 3-key combinations common in gaming (W+A+Space, Q+W+E). If extra keys light up that you didn't touch, your keyboard has ghosting. Anti-ghosting keyboards use per-switch diodes to prevent this.

NKRO means every key press registers independently no matter how many keys you press simultaneously. Press as many keys as you can at once and watch the counter. True NKRO keyboards via USB should register 10+ simultaneous keys without dropping any. 6-key rollover (6KRO) keyboards — including most Bluetooth keyboards — stop registering after 6 simultaneous keys.

Yes. All mechanical switch types are supported — Cherry MX (Red, Blue, Brown, Black, Speed, Silent), Gateron, Kailh (Box, Speed, Choc low-profile), Holy Panda, Topre (electrostatic capacitive), and optical switches (Razer, Gateron Optical). Hot-swap and soldered boards work identically. The tester detects key events via the browser's KeyboardEvent API regardless of switch type.

Press and release a single key slowly, once. If the total presses counter increments by 2 or more from one physical press, the switch is chattering — sending duplicate signals. This is common in aging mechanical switches. Fixes: increase debounce time in firmware (QMK/VIA: set to 10–15 ms), clean the switch with electronic contact cleaner, or replace the switch on hot-swap boards.

The tester shows key press and release events in real time. While browser-based tests can't measure precise hardware latency (display and OS add overhead), you can compare relative response feel between keyboards. For exact latency numbers, hardware tools like an oscilloscope or LDAT device are needed.

Yes. The tester detects physical key positions using key codes, so it works with any layout — QWERTY (US/UK), AZERTY (French), QWERTZ (German), Dvorak, Colemak, JIS (Japanese), ISO (European). The visual display shows a standard ANSI layout as reference. Your physical key position is what's detected, not the character it types.

Yes. Built-in laptop keyboards (scissor switch, butterfly switch) work normally. The Fn key is handled at the hardware/firmware level and typically doesn't generate a browser event. Function key combos (Fn+F5 for brightness, etc.) send the secondary function's key code. Media and special keys are detected when they generate standard key events.

Wireless keyboards work the same as wired ones in the browser. Note that Bluetooth keyboards are typically limited to 6-key rollover due to the Bluetooth HID protocol. 2.4 GHz wireless keyboards (with a USB dongle) can support full NKRO depending on the receiver. For the most accurate NKRO test, use a USB wired connection.

The Fn key on most keyboards is intercepted by the keyboard's firmware and never generates a browser event — this is by design. It modifies other key signals at the hardware level before they reach your computer. This isn't a bug in the tester; it's how Fn keys work across virtually all keyboards.

For competitive gaming, linear switches (Cherry MX Red, Gateron Yellow, Kailh Speed Silver) have no tactile bump and actuate smoothly — ideal for rapid keypresses. Optical switches (Razer, Gateron Optical) have faster actuation since there's no physical contact point. Use this tester to verify your keyboard's NKRO and anti-ghosting capabilities, which matter more than switch type for gaming.

Click the 'Reset' button to clear all highlighted keys, reset the press counter, and start fresh. This is useful when you want to systematically test every key from scratch or switch to a different keyboard.

Yes. Click Reset, then start pressing keys on the other keyboard. The browser detects key events from whichever keyboard is active. This is useful for comparing two keyboards side by side — test all keys on one, reset, then test the other.

Yes. It is free with no downloads and no display ads. Keystrokes are processed entirely in your browser and never sent to any server. Affiliate recommendation events, when present, never include key values or device identifiers.