Full-size virtual keyboard layout
A complete on-screen layout mirrors your physical board, so every key — including modifiers and the function row — has a place to light up.
Free • Instant • No Download
Keyboard Tester — Test Every Key Online, Instantly
Press any key and watch it light up on a live virtual layout. KeyPulse is the free keyboard tester that finds dead keys, stuck keys, and ghosting right in your browser.
Test Your Keyboard in Seconds
The live keyboard tester at the top of this page is ready when you are: a full on-screen keyboard layout that lights up in real time as you press each physical key. Tap a key, watch it highlight, and you'll know instantly whether that switch or membrane is actually registering — with nothing to install and nothing to configure.
KeyPulse is a completely free keyboard tester. Because it runs entirely in your browser, you can test keyboard online on Windows, Mac, Linux, or Chromebook — using a laptop's built-in board or any external USB, wireless, or mechanical keyboard. The keypress test begins the moment you type your first character.
Whether you're checking a brand-new purchase, giving a secondhand board a once-over, or hunting down an intermittent typing fault, it's the fastest keyboard checker you can open.
Features
Everything you'd expect from a precise keyboard key tester, built into one free browser tool.
Per-key visual highlight
Each press triggers an instant visual confirmation, so you can test all keys on keyboard without second-guessing what registered.
Live key press counter
A running tally of registered presses helps you confirm that rapid or repeated inputs are all being counted.
Stuck key and ghosting detection
Keys that stay lit or trigger on their own stand out immediately, making the tool a practical stuck key finder.
Works across browsers and systems
Use it as a keyboard checker on Windows, Mac, Linux, or Chromebook, with laptop, external, and most mobile keyboards.
Accurate for gaming and mechanical boards
Hold multiple keys at once to probe rollover behavior — ideal for gamers and mechanical keyboard enthusiasts verifying what a board can really do.
Frequently asked questions
Is this keyboard tester free?
Yes. KeyPulse is completely free with no usage limits, no signup, and no download. Open the page and test as many keys as you like, as often as you like.
Does the tester store or transmit my keystrokes?
No. Every keypress test runs locally in your browser. Nothing you type is recorded, logged, or sent to any server — close the tab and it's gone.
Does it detect ghosting and rollover limits?
Yes. Hold down several keys at once and watch which ones light up. If some pressed keys fail to register, your keyboard is hitting its rollover limit or ghosting — common on older membrane boards.
Does it work on laptop and external keyboards, and on Mac, Windows, Linux, or Chromebook?
Yes to both. The tester works with built-in laptop keyboards, external USB and wireless boards, and most mobile browsers. It runs in any modern browser, so the experience is the same across Mac, Windows, Linux, and Chromebook.
Why isn't a key registering?
First, make sure the test area is selected. If other keys light up but one never does, that key's switch or connection is likely faulty. Also check for OS-level key remaps or a stuck modifier key, which can change what your keyboard sends.