Ready when you are
Local onlyFocus the tester, then press as many keys as you like.
Last key—
Keys confirmed0
Esc1234567890⌫
TabQWERTYUIOPEnter
CapsASDFGHJKL'↵
ShiftZXCVBNM,.Shift
CtrlAltSpace←↑↓→
Device check
Keyboard Test
Press keys and see them light up instantly to spot missing, stuck or unreliable inputs.
✓ Instant result✓ No sign-up✓ Runs in your browser
01
How to use this test
- Click inside the keyboard tester.
- Press keys one at a time or in combinations.
- Confirmed keys stay highlighted so you can spot gaps.
02
If something looks wrong
- Try the key several times if it responds inconsistently.
- Check modifier keys on both the left and right sides.
- Some system shortcuts may be intercepted by your operating system.
What the result means
Each highlight is a key event received by this tab.
When the tester is focused, it listens for browser keyboard events and marks each physical-key code it receives at least once. Testing every position can reveal a key that never reaches the page or reports a different location. The page does not store the text you type and stops observing keys when the tester is not active.
Keyboard layouts translate physical positions into characters, so a working key can display a character you did not expect when the operating-system language is wrong. Some system shortcuts never reach a web page because the browser or operating system reserves them. That is normal and should not be confused with a failed switch.
Reading the signal
Test position, repetition and combinations separately.
Single-key response
Press every key once and look for gaps. A key that never highlights while adjacent keys do may have a hardware, connection or remapping problem.
Modifier keys
Test left and right Shift, Control and Alt separately. They can share a printed label while reporting distinct physical positions.
Wrong character
If the physical position responds but the character differs, check the selected keyboard language and layout before suspecting hardware.
Combination limits
Keys that work alone but fail in a large combination can expose matrix ghosting or rollover limits. Reserved shortcuts may be intercepted before the page sees them.
Browser-test limits
A browser cannot test firmware, scan rate or every operating-system shortcut directly. The page shows events delivered to this tab; accessibility software, remapping tools, remote desktops and browser shortcuts can change or suppress them.
Read our complete testing methodology →Troubleshooting
From symptom to next step.
What you seeLikely causeWhat to try
One key never appearsThe switch may be obstructed or faulty, or software may have remapped the key.Try the key in another app, clean around it safely, reconnect the keyboard and disable remapping utilities for comparison.
Characters are wrongThe selected language or physical layout does not match the keyboard.Choose the correct layout in operating-system language settings and retest the physical positions.
Keys disconnect togetherA wireless link, USB hub, power problem or keyboard matrix limit is affecting several inputs.Use a direct wired port, replace or recharge the battery and test smaller combinations before comparing another keyboard.
Quick answers
Good to know.
Can this test read what I type elsewhere?+
No. It only responds while the on-page keyboard tester is focused.
Why do some shortcuts not appear?+
Your browser or operating system may reserve shortcuts such as switching apps or opening system menus.
What is keyboard ghosting?+
Ghosting describes missing or unintended key reports in certain simultaneous combinations because of the keyboard's electrical matrix. Test the exact combination used in your game or shortcut.
Why do media or function keys behave differently?+
Their behavior may be handled by firmware, an Fn layer, vendor software or the operating system, so a standard browser event is not guaranteed.
Can this test diagnose key chatter?+
No. Confirming whether one press creates repeated events requires an event counter or electrical debounce measurement. This page records only whether each physical position responded.