Reaction Time Test
Benchmark your visual reaction speed in milliseconds with high-resolution hardware timestamps.
Tap or click anywhere to begin
When the red box turns GREEN, tap or click as fast as possible.
Human Visual Benchmark
The average human reaction time to visual stimuli is 200ms - 250ms. Esports professionals often reach 150ms - 190ms.
Display Refresh Impact
High-refresh-rate monitors (144Hz - 360Hz) reduce screen frame latency by up to 12ms compared to standard 60Hz panels.
Sub-Millisecond Accuracy
Calculated using hardware performance clocks without artificial intervals or timer throttling.
Explore Other Diagnostic & Speed Tools
Test your keyboard spacebar, benchmark visual reflexes, and check mouse switches.
CPS Speed Test
Benchmark your clicking speed across Regular, Jitter, Butterfly, and Drag techniques.
Spacebar Counter
Test your physical spacebar tapping rate with sub-millisecond hardware accuracy.
Keyboard Counter
Measure multi-key typing frequency, keys per second (KPS), and estimated WPM.
Simple Click Counter
Count clicks with persistent browser auto-save, custom step increments, and goals.
Double Click Test
Detect mouse switch chattering, debounce jitter, and unintentional double-clicks.
Mouse Hardware Test
Verify left, right, middle wheel, scroll up/down, and side browser buttons.
Personal History
Track your best scores, performance progression curves, and lifetime clicks.