Reaction Time Test

Measure visual reaction speed in milliseconds with false-start detection.

What you needA modern web browser

Your objectiveMeasure visual reaction speed in milliseconds with false-start detection.

Start hereRead the controls, choose any available duration or difficulty, then press Start.

Preparing challenge…

Your personal best is saved locally on this device. Results can vary by hardware and browser.

Rules and important details

Use the same device and input method when comparing scores.
Do not use automation or browser tools to create an artificial score.
Results are for entertainment and personal comparison.

Useful term

Your personal best is stored only in this browser.

About this reaction time test online

Measure visual reaction speed in milliseconds with false-start detection. The tool runs in your browser, so you can retry immediately without creating an account.

FAQ

Frequently asked questions

What is a good reaction time?

Scores vary by device and conditions; compare repeated attempts on the same device.

Is Reaction Time Test free?

Yes. You can use it repeatedly without creating an account or installing an app.

What should a complete beginner do first?

Read the controls, choose any available duration or difficulty, then press Start.

Reaction Time Test

Rules and important details

About this reaction time test online

Frequently asked questions

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