Reaction Time Test
Practice visual reaction with local rounds and aggregate statistics.
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How to use
- 1Open the test, grant permission only when needed, and review the result in your browser.
About
A local UtilNexo tool for a quick check without sending test data to a server.
Reaction Time Test Online | UtilNexo
Measure visual reaction time in milliseconds over five rounds.
Start, wait for green, then click as soon as the color changes.
Reaction is the interval between the green signal and the click using performance.now().
Example use
Start, wait for green, then click as soon as the color changes.
Reaction is the interval between the green signal and the click using performance.now().
Example use
- Reaction is the interval between the green signal and the click using performance.now().
- Start, wait for green, then click as soon as the color changes.
Limits and privacy
- Tests run in the browser and do not diagnose physical defects.
- Microphone and webcam require explicit permission; media tracks stop when you stop the test.
- Results vary with browser, system, and room conditions.
How to use
- 1Open the tool and read the guidance.
- 2Grant permission only for audio or video tests.
- 3Use the indicated area and compare results under the same conditions.
Frequently asked questions
How can I improve consistency?
Reaction is the interval between the green signal and the click using performance.now().
Is data uploaded?
No. Processing is local. Microphone and webcam stay in the browser and are stopped when you stop.
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