The keyboard tester shows a full-size layout and highlights each key as you press it, reporting the key name and code. It quickly finds dead keys, stuck keys and keys that only fail when pressed together (ghosting). Check that every key on your keyboard works.
What does this tool do?
Tests every key on your keyboard: press keys and watch them light up, revealing dead keys, stuck keys and ghosting. Also shows key codes for developers.
Keep it bookmarked or on your home screen — utilities prove their worth through repetition, and the one you can open in two taps is the one you will actually use when the need strikes.
The controls are straightforward: “Reset” starts over. Results update live as you work — there is no waiting and nothing to submit.
How do I use this tool?
The tool is ready the moment the page opens — no setup, no account. The steps below cover everything it does.
- Provide the input the tool asks for.
- Results update instantly as you type — no button to press.
- “Reset” starts you over with a clean slate.
How does it work?
Keydown/keyup events are captured and visualised per key; the tool reports the event code (e.g. KeyA) which identifies the physical key regardless of layout. Keys that never light up are dead; keys stuck “on” are stuck.
State lives in the tab: start it, use it, close it. There is no backend to fail, no sync to conflict — which is also why the tool loads instantly and works offline after the first visit.
Use cases in Pakistan
Buyers test second-hand keyboards in Hall Road (Lahore) and Regal (Karachi) markets; gamers check anti-ghosting (multiple keys at once); and anyone with a misbehaving key diagnoses it in seconds before paying for repairs.
These are the tools people recommend to each other on WhatsApp — simple, free, no install — because they solve the small problems everyone hits: timing something, picking fairly, testing a device. Bookmark the ones you use; they age well.
Limitations
It tests what the OS delivers — a key dead here is dead everywhere, but intermittent faults need longer testing. It cannot fix hardware; it only diagnoses.
Convenience tools are not certified instruments: fine for everyday purposes, but do not stake safety, money or legal outcomes on a browser utility. Know which category your use falls into.
Frequently asked questions
A key doesn’t light up — dead?
Almost certainly a hardware fault (or a Fn-lock/mode issue on laptops). Try another USB port/computer to confirm. For anything time-sensitive, do a trial run first so you know exactly how the alert looks and sounds when it matters. Keep the tab visible and the device awake for timing tasks; background throttling is the main source of surprises.
What is ghosting?
Cheap keyboards drop keys when many are pressed together — gamers test WASD + extras here to check. Keep the tab visible and the device awake for timing tasks; background throttling is the main source of surprises. Bookmark the tool if you use it more than once — utilities earn their keep through repetition.
Why do codes matter?
Key codes identify physical keys across layouts — useful for developers and for remapping tools. Bookmark the tool if you use it more than once — utilities earn their keep through repetition. For anything time-sensitive, do a trial run first so you know exactly how the alert looks and sounds when it matters.
Laptop Fn keys?
Fn combinations are often handled by hardware before the OS sees them — some will not register here by design. For anything time-sensitive, do a trial run first so you know exactly how the alert looks and sounds when it matters. Keep the tab visible and the device awake for timing tasks; background throttling is the main source of surprises.
Is my data uploaded or stored?
No. This tool runs entirely in your browser — what you type or paste never leaves your device, is never sent to a server, and is never stored. Closing the tab removes all trace. Keep the tab visible and the device awake for timing tasks; background throttling is the main source of surprises. Bookmark the tool if you use it more than once — utilities earn their keep through repetition.
Is it really free? Do I need an account?
Yes, free, and no account needed. Open the page and use it — no sign-up, no trial, no watermark on results. Bookmark the tool if you use it more than once — utilities earn their keep through repetition. For anything time-sensitive, do a trial run first so you know exactly how the alert looks and sounds when it matters.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested