Reaction Time Tester
Test your reaction time online for free. Measure visual reaction speed in milliseconds with average tracking and leaderboard comparison.
The full version of Reaction Time Tester is being built right now. We add new fully functional tools every week. In the meantime, you can use the basic workspace below.
About Reaction Time Tester
Test your reaction time online for free. Measure visual reaction speed in milliseconds with average tracking and leaderboard comparison.
This tool is completely free and runs 100% in your browser. Your data is never uploaded to any server — everything is processed locally on your device for maximum privacy and speed.
About Reaction Time Tester
Test your reaction time online for free. Measure visual reaction speed in milliseconds with average tracking and leaderboard comparison.
Features
- 100% free with no sign-up required
- Runs entirely in your browser for full privacy
- No data stored, no files uploaded to servers
- Works on desktop and mobile devices