Test your devices online.Fast. Simple. Accurate.

Six tool suites live on this site: keyboard testing (keys, rollover, chatter, typing speed), display diagnostics (dead pixels, refresh rate, motion clarity), audio checks (speakers, headphones, microphones), online calculators, mobile device and sensor tests, and quick browser games. Every category has its own hub page linked from the homepage.

Use the search box near the top of any homepage — type "ghost", "mic" or "fps" and matching tools appear instantly. Otherwise pick a category tile in the quick launcher, drill into the hub page, or browse the popular tools list.

No. Every testing, diagnostic and calculator tool on Real Test Keyboard is free, with no sign-up, no usage limits and no paywalls.

Yes — the tools use standard web APIs, so they run in modern browsers on any of those systems. A few hardware-specific tests depend on browser support: vibration requires an Android browser (iOS Safari blocks the Vibration API), and some sensor prompts behave differently between Chrome and Safari.

The best online keyboard tester checks every key, flags chatter and double-firing, counts each press, supports full, TKL and 60% layouts, and runs free in your browser without collecting your data. Real Test Keyboard does all of this — press a key and it lights up instantly, with a clear pass-or-fail verdict once every key is tested.

Open the tester, then press every key on your physical keyboard one by one. Each key lights up and stays marked once it registers. When every key is lit, your keyboard passes. Any key that never lights up isn't reaching your computer.

Yes. Press any single key and the matching key on the on-screen diagram lights up while its press counter goes up. That makes it easy to check one suspect key — a sticky spacebar or a dead arrow — without running through the whole keyboard.

Yes. Hold several keys down together and each one lights up independently, so you can check key rollover and anti-ghosting — useful for gaming boards where combinations like W + A + Shift must all register at once. If a key stops responding while others are held, your keyboard has a rollover limit on that combination.

Yes. Modifier keys (Shift, Ctrl, Alt, Command/Windows) are tested like any other key. For Tab, Space, the arrow keys and the F-row, turn on Capture keys in the toolbar so the browser doesn't scroll, change focus or fire shortcuts while you test them. F5, F11 and F12 are left to the browser on purpose so you keep refresh and fullscreen.

If a key never lights up, first turn on Capture keys — some keys like Tab, Space and the arrows are otherwise handled by the browser. If it still doesn't register, the key may have a hardware fault, or it may be one that doesn't send a standard signal (such as Fn, or some laptop media and brightness keys). A key that works here but not in your app points to a software issue rather than the keyboard.

A worn or dirty mechanical switch can register a single press as two — that's chatter (also called double-firing). The tester times the gap between a key's release and its next press; anything under 40 milliseconds is flagged as a possible fault and the key is highlighted in red.

Matching is done on the physical key position (KeyboardEvent.code), not the character it produces. That means the right cell lights up on QWERTY, AZERTY, QWERTZ and other layouts — the character shown by your OS doesn't affect the test.

Full is the complete 104-key board with a number pad. TKL (tenkeyless, 87 keys) drops the number pad. 60% (61 keys) also drops the function row and navigation cluster. Pick the one that matches your keyboard, and use the ANSI/ISO toggle to match your Enter and left-Shift shape.

Yes. It works with any Windows keyboard — built-in laptop keyboards, USB and Bluetooth boards — in Chrome, Edge, Firefox and other modern browsers. The Windows and menu keys register just like the rest, and you can test the full 104-key layout including the number pad.

Yes. It works with the built-in MacBook keyboard, the Magic Keyboard and external boards, in Safari, Chrome and other browsers. Command, Option and Control all register normally. Apple's Fn / globe key doesn't emit a standard key event, so it may not light up — that's expected, not a fault.

Yes — it's ideal for both. On mechanical keyboards the chatter check catches worn switches that double-fire, and the press counter shows exactly how many times each key registered. For gaming keyboards, hold several keys at once to check rollover and anti-ghosting on the combinations you actually use.

The tool tests physical keyboards, so it shines when a hardware keyboard is connected — for example a Bluetooth or USB keyboard paired with a phone or tablet, which you can test just like on a desktop. A phone's on-screen touch keyboard has no physical switches to check, so there's nothing for the tester to verify there.

Yes. Real Test Keyboard runs entirely in your web browser — there's nothing to download, no app to install and no extension to add. Open the page, start pressing keys, and you're testing in seconds.

Yes, it's completely free. There's no account, no sign-up, no usage limit and no paywall — test as many keyboards as you like, as often as you like.

No. Everything runs locally in your browser and your keystrokes never leave the page — nothing is uploaded or recorded. The only thing saved is your layout preference (such as TKL or ISO), kept in your browser's local storage on this device so the tool remembers it next time.

Click Reset in the toolbar to clear every tested key and press count and start fresh. Reloading the page also resets the test, since each test is a point-in-time check of your keyboard.