Online Keyboard Tester

Select “Start testing” and press keys on your physical keyboard. See which keys are held, which positions the browser detected and which ones to retry.

Test keyboard response

Press keys and see which ones reach your browser.

Ready to testSelect “Start testing”, then press each physical key in turn.
✓
0Detected
○
104Not tested
↕
0Events
⌘
0Simultaneous
UntestedPressedDetected

Swipe horizontally to see the full keyboard on small screens

Last detected key
No key detected yet—
Keys currently held
No key held

Event history

0 / 12

Recent keydown and keyup events will appear here.

How to Test Your Keyboard

01

Start a test session

Select Start testing so the page can listen for physical keyboard events.

Read the detected key and code

Key colors and position codes

Purple means a key is held; green means the browser received an event. “Last detected key” shows the character or function the system interpreted, while a code such as KeyA identifies the key position. The character may differ from the printed label when you change keyboard layout.

Test a key combination

“Simultaneous” is the highest number of positions the page saw held at once, not a guaranteed keyboard specification. Try a combination you actually use and check that each key lights up.

If a key does not light up as expected

Key stays gray
Click the test area again, press the key on its own and check the event history. For Fn, system keys or keys missing from this layout, check with another app too.
Key appears held
Release it and look for a keyup event in the history. If the window lost focus, the page clears held state; retry in the same tab.
A combo misses a key
Test each key alone, then hold that combination and check the purple keys and Simultaneous count. The result only reflects events received by the browser in that attempt.

Key history during the test

The page displays key characters/functions and keeps up to 12 recent events in tab memory; Reset clears the history. Avoid typing passwords or sensitive text while testing. The tool script does not send key events to a processing API.

Comments & feedback

Rate this tool

Loading ratings…

Write a commentNo account needed
Up to 4,000 characters0 / 4.000

Do not share passwords, sensitive information or the contents of files you are processing.

Reviewed before posting. Email stays private.