Online Keyboard Tester & Key Checker
Press physical keys to see the events received by this browser. Compare individual taps and key combinations; missing events can have hardware, connection, focus or software causes.
Keystroke Counter
Counts received non-repeat keydown events. Pointer clicks are previews only. Compare deliberate taps; counts do not diagnose hardware. Tab and system-reserved shortcuts may not be counted.
Press any key to start counting...
How It Works
Three simple steps to test your entire keyboard
Click This Page
Click the page background to give it focus. Tab and focused controls retain normal navigation.
Press Every Key
Press keys normally. A highlight shows a received event; the retained mark shows that this layout position has been observed.
Check Results
Compare missing inputs in another app and inspect the connection or system shortcuts. A highlighted key is not a hardware-health certificate.
Why Use ToolKnit Keyboard Tester?
Test Before You Buy
Buying a used keyboard? Test every key before paying. Make sure you're not getting a defective product.
Investigate Input Problems
See which events reach the page and compare reproducible differences across apps or connections.
No Installation Needed
Works directly in your browser. No software to download, no drivers to install. Just open and start testing.
Common Physical Keyboards
Use a connected physical keyboard. Available keys depend on your browser, operating system and layout; virtual previews do not test hardware.
Why choose ToolKnit for Keyboard Tester?
How does the keyboard tester work?
The page highlights received keydown events and clears active highlights on release or focus loss. The display shows browser input, not direct electrical testing of a switch.
Why doesn't my key light up?
Check page focus, connection and another app. Fn, media keys and OS shortcuts may never reach the browser. Tab is reserved for navigation here; a missing event does not by itself prove a broken key.
Does this work on laptops?
Built-in laptop keyboards can send ordinary key events. Fn layers, system shortcuts and layout-specific keys may be unavailable. Use the device maker’s diagnostics for hardware-specific checks.
Is my data collected?
This tester does not upload keystrokes. Counts and labels are held in the current page; ordinary website analytics and preferences are separate. Do not type passwords into a keyboard test.
What Is a Keyboard Tester?
A keyboard tester visualizes the key events exposed to a webpage. It can help investigate missed or repeated input, but browser restrictions, focus, remapping and connection modes limit what it can observe.
How to Test Your Keyboard Online
Use a short, controlled check:
- Open this page in any modern browser —Chrome, Firefox, Edge, or Safari.
- Press keys normally and compare received highlights. Pointer clicks only preview the layout.
- Check the progress counter at the top to see how many keys you've tested and the completion percentage.
- Investigate gaps in another app or connection before assuming a physical fault.
Key events stay in this page. This does not mean the entire website makes no analytics or resource requests.
Why Use an Online Keyboard Test?
There are many situations where an online keyboard check comes in handy:
- Buying a used keyboard —quickly verify every key works before paying.
- After cleaning —confirm no keys were damaged during disassembly or cleaning.
- Troubleshooting — collect reproducible input evidence before further diagnosis.
- Gaming setup —ensure all keys register for competitive gaming where every key matters.
- New keyboard check —verify a brand-new keyboard is fully functional out of the box.
Common Keyboard Problems & How to Detect Them
This keyboard tester helps you identify several common issues:
- Missing input — no event arrives. Check focus, reserved shortcuts, connection and other apps; do not press harder.
- Lingering highlight — a release event may have been missed during a focus change. Reset and compare another app before diagnosing a stuck switch.
- Ghosting or blocking — compare extra unpressed events and missing held keys in several combinations. Software can also intercept combinations.
- Duplicate input — compare brief taps with non-repeat event counts. Macros and software can duplicate input as well as switch faults.
Mechanical vs Membrane Keyboard Testing
Mechanical keyboards, membrane keyboards and laptop keyboards expose events through the operating system. The webpage cannot identify an internal failed component; model-specific repair guidance remains necessary.
For USB or Bluetooth devices, compare another supported connection when possible. A browser test does not measure full input latency or certify every possible key combination.