MouseTester.io checks mouse buttons and scrolling, and reports click timing, polling rate, and double-click behavior.
Keyboard Tester
KeyboardTest.io checks keyboard inputs and lists tools for identifying dead keys, ghosting, and input latency.
About Keyboard Tester
KeyboardTest.io provides a virtual keyboard that lights up when physical keys are pressed to identify dead or unresponsive switches. It also offers rollover testing for ghosting and key loss, chatter detection for extra triggers, and latency measurement using event timestamps.
The site states tests run locally in the browser without recording key content or uploading input data. It notes browser-based latency is affected by OS scheduling and render frame rates, with 10-30ms described as normal system latency.
Key features
- Visual key press test for dead or unresponsive keys
- N-key rollover testing for ghosting with 6KRO and NKRO support
- Chatter detection to identify abnormal secondary switch triggers
- Input latency measurement based on event timestamps
- Keyboard specification explanations covering NKRO, polling rate, debounce time
- Troubleshooting steps for key chatter, ghosting, and cleaning
Best for: People testing a mechanical or membrane keyboard for dead keys, ghosting, chatter, or input latency.
Good for
- No drivers or software installation required
- States tests are calculated locally without uploading input data
- Covers function, rollover, chatter, and latency checks in one page
Watch out for
- Latency readings are affected by OS scheduling and browser frame rates
Keyboard Tester at a glance
- Website
- keyboardtest.io
- Category
- Software & Utilities › Hardware & Diagnostics
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Keyboard Tester FAQ
Why does the test show latency?
Browser-based tests are affected by OS scheduling and render frame rates. 10-30ms is described as normal system latency, while over 50ms might affect competitive gaming.
What do 60%, TKL, and 100% mean?
They are layout sizes. 100% is standard 104-key, TKL is 87-key without a numpad, and 60% lacks the F-row and arrows.
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