Reaction Time Test
Free online reaction time test. Process data instantly in your browser. No upload, no signup, fully private.
Local processingClick to start
Wait for green, then click as fast as you can
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
Is this Reaction Time Test free?
Yes, completely free. No signup required.
Does this tool upload my data?
No. All processing happens locally in your browser. Your data never leaves your device.