Reflex grid
Whack-a-mole style speed game — tap the lit tile as fast as you can for 30 seconds and track your reaction time.
Misses: 0. Everything runs locally in your browser.
How to use
Reflex grid lets you whack-a-mole style speed game — tap the lit tile as fast as you can for 30 seconds and track your reaction time. Click start and play right in your browser — no install, no sign-up.
The game runs entirely in your browser and works offline once loaded. It's completely free, with no sign-up, no watermarks and no limits on how often you use it.
Examples
Beat your own best score; progress is kept locally so you can pick up where you left off.
Once reflex grid shows your output, use the copy or download button to grab it — no retyping.
Frequently asked questions
Is Reflex grid free to use?
Yes. Reflex grid is completely free with no sign-up, no watermarks and no usage limits.
Is my data private?
Yes. The game runs entirely in your browser and works offline once loaded.
Does Reflex grid work on mobile?
Yes. It works in any modern browser on desktop, tablet or phone, and keeps working offline once the page has loaded.
Related tools
Measure your typing speed in words per minute with live WPM, accuracy and a 15/30/60-second timer.
Test your reflexes — wait for green, then click as fast as you can. Tracks your best and average in milliseconds.
Click as many targets as you can in 30 seconds. Tracks hits, accuracy and your best score.
Slide and merge numbered tiles to reach 2048. Smooth animations, keyboard and swipe controls, best-score saving.
Flip cards to find matching pairs in as few moves as possible. Classic concentration memory game.
Slide the numbered tiles to arrange them 1–15 in order. The classic sliding-block puzzle with animated moves.