Keyboard Test

One key stops working and suddenly your passwords, emails and game nights all grind to a halt. This free keyboard tester shows you exactly which keys your computer is receiving and which it is not. Press Start above, then press every key on your real keyboard: working keys light up on the on-screen board, and a counter tracks how many of the keys you have tested. It takes about a minute, needs no download and runs entirely in your browser. It is one of the free checking tools on Speed Test UK — and unlike most testers you will find online, this one is drawn for a proper UK keyboard layout, £ key and all.

People usually arrive here for one of three reasons. A key has started missing, doubling or sticking and you want proof before you spend money. You have bought a second-hand laptop or a new mechanical keyboard and want to check every switch before the returns window closes. Or a key works in some apps but not others, and you need to know whether the fault is in the hardware or the software. This test, plus the guide below, answers all three.

How to Test Your Keyboard Online

You do not need to install anything. The tester listens for the key signals your browser receives, so it works on Windows, macOS, ChromeOS and Linux, with laptop keyboards, wired boards and most wireless ones. For a result you can trust, work through it methodically:

• Step 1: Click Start testing. This switches capture on, so keys like Tab, Space and the arrows are held by the test instead of scrolling the page or jumping between links.
• Step 2: Work along each row in order — number row first, then the letter rows — pressing every key once, firmly and normally. Watch it light up blue while held, then green once released and counted.
• Step 3: Do not skip the awkward ones: both Shift keys, both Ctrl keys, Alt and Alt Gr, Caps Lock, Enter, Backspace, the arrow keys and the key beside left Shift that US keyboards do not have.
• Step 4: Keep an eye on the “Last key” panel. It shows the character and the physical key code your computer reported, which is useful when a key types the wrong symbol.
• Step 5: Note any key that stays white. Press it two or three more times, slowly and then firmly. A key that never lights up is not reaching your computer at all.
• Step 6: Click Stop testing when you are done, and use Reset if you want a clean run — for example after cleaning a suspect key and trying again.

A visual response means the signal reached your browser. No response is strong evidence of a problem, but not absolute proof of a dead switch: a flat wireless battery, a loose cable or a system shortcut can also swallow a keypress. The troubleshooting section further down helps you separate those causes before you conclude anything.

Why the UK Layout Matters

Most online keyboard testers are drawn for American keyboards, and if you have ever used one you will know the small frustrations: the ” and @ keys are swapped, there is no £ sign on the 3 key, the Enter key is the wrong shape, and the extra key between left Shift and Z simply does not exist on screen. Test a British board against an American picture and you can end up thinking a perfectly good key is missing, or never testing your # and \ keys at all.

This tester follows the UK (ISO) arrangement. The number row carries ” on 2 and £ on 3. The ‘ key also carries @, the key beside Enter carries # and ~, and the additional key next to Z carries \ and | — the key that American (ANSI) layouts leave out entirely. Enter is shown in its taller UK position at the end of the letter rows. If a key on your physical board has no matching square on screen, that is a sign the layout matters, not that your keyboard is odd. Match the picture to your board and every key gets its turn.

Reading Your Results: What Each Fault Usually Means

The pattern of failures tells you far more than any single dead key. Find your pattern in the table below before you decide what to do next.

The single most useful comparison is a second computer. If the same key fails on two machines, the keyboard is at fault. If it works fine elsewhere, your first computer’s settings, drivers or software are where the answer lives.

Ghosting and Rollover: Pressing Several Keys at Once

Single keys are only half the story. Hold down several keys together — say W, A and Shift, the classic gaming handful — and watch whether they all light up at once. Keyboards have limits on how many simultaneous presses they report, called rollover. Older and cheaper boards may only manage two or three ordinary keys together; gaming boards advertise “n-key rollover” (NKRO), meaning every key at once. “Ghosting” is the nastier cousin: pressing a combination makes an extra, untouched key register.

For everyday typing, rollover barely matters. For gaming it can decide a round — a keyboard that drops your third key has just cancelled your sprint or your ability. If combinations fail here but single keys all pass, your switches are fine; it is the keyboard’s circuitry that has limits, and no amount of cleaning changes that. It is a buying consideration for your next board, not a repair job on this one.

Laptop Keyboards vs External Keyboards

Laptop keyboards fail differently. Their keys sit on scissor mechanisms over a membrane, connected by a thin ribbon cable, and the whole board is often one replaceable unit costing far more in labour than in parts. The most common laptop faults are single keys killed by crumbs and grit, clusters damaged by spills, and intermittent faults that come and go with heat or with the angle of the screen — a classic ribbon-cable symptom. This test is ideal for catching a failing laptop board early, while the machine is still under warranty or a returns window.

External keyboards give you more options. Mechanical switches can often be replaced individually, keycaps come off for proper cleaning, and a wired board that fails this test on two computers is straightforwardly finished. Wireless boards add two innocent explanations to check first: battery level and interference. Test a wireless keyboard with its cable plugged in, if it has one, before writing it off.

One more laptop note: a few keys will never light up in any browser test, on any machine. The Fn key and the brightness, volume and media keys it controls are handled inside the laptop before your browser hears anything. That is by design, not a fault.

What to Try Before You Pay for a Repair

• Clean it properly. Power down, turn the board upside down and tap out the debris, then work around the faulty key with compressed air. A surprising share of “dead” keys are just grit under a keycap.
• Remove and reseat the keycap (external keyboards and confident laptop owners only). Check for a cracked stem or a trapped crumb, then test again here.
• Rule out software. Boot the test in a different browser, close macro and remapping tools, and check your operating system’s keyboard settings. Windows and macOS guidance from Microsoft Support and Apple Support covers driver and accessibility settings such as Filter Keys, which can make a healthy keyboard feel broken.
• Test on a second computer. Five minutes that separates “keyboard fault” from “computer fault” beyond argument.
• Check warranty and returns first. In the UK, a keyboard that fails early is the retailer’s problem before it is yours. Run this test the day a new board or laptop arrives, not the week after the window closes.
• For repairs, look before you pay. Guides on iFixit will show you honestly whether your model is a five-minute switch swap or a full teardown, so a repair quote holds no surprises.

Keyboard Testing for Gaming and Work

Gamers should test the cluster they actually play on — WASD, Space, Shift, Ctrl and the number row for weapon swaps — including holding them in combination, as described above. Spacebar deserves special attention: a spacebar that misses or doubles is a jump that fails, and it is the largest, most-stressed key on the board. If your board passes here but you still feel slow in game, the bottleneck may be your reactions or your connection rather than your keys — measure both with our reaction time test and the tools on our homepage.

For work, the economics are simpler. A keyboard that drops one letter in fifty is a typo machine that costs you proofreading time all day, and intermittent faults are exactly what a full-board test exposes. If every key passes but your output still feels slow, that is a speed question rather than a fault — find out where you stand with our typing speed test, and if your mouse is the device acting up, the click speed test will give it the same treatment.

Frequently Asked Questions

How do I test if all my keyboard keys are working?

Click Start testing above and press every key once, row by row. Each key lights up blue while held and green once counted, and the counter shows your progress against the full board. Any key still white at the end did not register — press it again slowly to be sure.

Why does this keyboard look different from American testers?

Because it is drawn for the UK. British keyboards use the ISO layout: £ on the 3 key, ” on 2, @ on the apostrophe key, # beside Enter, and an extra \ key next to Z that US boards do not have. Testing a UK board against a US picture leaves keys out and can make healthy keys look missing.

Why do my Fn and volume keys not light up?

Those keys are handled by the laptop itself, before the signal reaches your browser, so no web page can see them. The same applies to a few system shortcuts your operating system keeps for itself, such as Alt+Tab. It is normal and not a fault.

What does it mean if a key types twice?

Usually switch chatter: a worn or dirty contact bouncing and registering two presses for one. Clean the switch and retest. If a mechanical keyboard keeps doubling on the same key, that switch is at the end of its life and needs replacing.

Can this test check a wireless keyboard?

Yes. The tester reads the same signals however they arrive. If a wireless board fails here, test it plugged in or with fresh batteries before concluding anything — low batteries cause exactly the missed, intermittent keys people blame on switches.

Is it safe to type passwords into a keyboard tester?

You never need to. The test only needs individual keypresses, not words. This tester runs entirely on the page and sends nothing anywhere, but as a general habit, do not type real passwords into any diagnostic website.

Test Your Keyboard Now

Scroll back up, click Start testing and give every key its moment — it takes about a minute and it is the difference between guessing and knowing. Then, for the rest of your setup, head to Speed Test UK to check your broadband speed, your reactions and your clicking speed too.