A standalone keyboard tester that allows diagnosing NKRO, chatter, and drop-offs locally.
Users
29
+6 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#133K
#111K among extensions
Version
1.0
updated 22 Apr 2026
Users
monthly, 6 months
Latest, 20 Oct 2026:29 usersMove the mouse over the chart for any month
Ratings count
monthly, 6 months
Latest, 20 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Keyboard Tester
A lightning-fast, zero-dependency keyboard tester right in your browser.
Test your mechanical keyboard, laptop keyboard, and custom macro pads instantly from a convenient popup, without ever needing to open a new tab or search for a testing website.
【 ✨ FEATURES 】
- Instant Recognition: Open the popup and start pressing keys! They will instantly map to the on-screen 60% visualizer grid.
- NKRO (N-Key Rollover): See exactly how many keys your keyboard can register simultaneously. Detects if you have true Full N-key Rollover or a cheaper 6-Key limit.
- CPS (Clicks Per Second): Test your raw typing or butterfly-clicking speed with customized time trials (5s, 10s, 30s).
- Physical Diagnostics: Built-in safeguards like double-click/chatter detection (< 30ms) and hardware drop-off testing to catch faulty switches.
- Real-Time Visuals: See your last pressed key highlighted prominently with zero latency.
- Always Accessible: Works seamlessly from your Chrome toolbar, whether you're on Windows, Mac, or ChromeOS.
【 🕹️ HOW TO USE 】
1. Connect your Keyboard:
Ensure your keyboard is plugged in via USB, or connected via Bluetooth/2.4G.
2. Open the Popup:
Simply click the extension icon in your Chrome toolbar to open the tester window.
3. Test Away:
- Mash the keyboard to test your NKRO limits!
- Click "Start Test" on the CPS card to measure your clicking speed.
- Click "Start Test" on the Drop-Offs card and hold a key down to test hardware stability.
【 🧰 NEED MORE PROFESSIONAL TOOLS? 】
This extension is a lightweight version of our comprehensive testing suite. If you need to test full 100% layouts, Mac/Windows specific keys, or diagnose ghosting matrices in depth, check out our full platform:
🔗 https://keyboardtest.io
Our main website features:
* Full 104-Key and TKL Layout Visualizers
* Detailed RGB Key-Matrix Tracking
* Custom Keycode Logs
* Mac and Windows operating mode toggles
* Advanced Chatter Analytics
【 👨💻 ABOUT THE DEVELOPER 】
Built with ❤️ by Luke.
I create web tools and SaaS products. If you're interested in my work, have feedback, or want to collaborate, feel free to reach out!
🌐 Portfolio & Contact: https://lukeio.com/contact/
Growth
Window
Users
Change
Ratings
Rating
7 days
+5
+20.8%
0
0.00
30 days
+6
+26.1%
0
0.00
6 months
+29
–
0
0.00
Chrome Web Store search rankings
Where Keyboard Tester appears when people search the store, with the 30 day change