🧪 SKILL TESTS
Most Popular
Reaction Time Test
Measure your reflex speed in milliseconds. 5-round average with human benchmark comparison.
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CPS Test
Click Speed Test
How many clicks per second can you achieve? 8 durations from 1 to 100 seconds.
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WPM Test
Typing Speed Test
Measure your words per minute and accuracy in real time. Average is 40 WPM.
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Aim Trainer
Stimulation Clicker
Free aim trainer. Hit moving targets to improve FPS accuracy for CS2 and Valorant.
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Jitter Click
Jitter Click Test
Practice jitter clicking and measure your maximum CPS. Used in Minecraft PvP.
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HPS Test
Spacebar Speed Test
How fast can you press the spacebar per second? Multiple durations available.
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Memory Test
Number Memory Test
How many digits can you memorize? Tests working memory. Average is 7 digits.
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🎮 GAMES
Idle Game
Clicker Tycoon
Click, upgrade, prestige and build a city. Free idle clicker game, progress auto-saves.
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Runner
Dinosaur Game
Classic Chrome T-Rex runner. Jump over cacti, duck under pterodactyls.
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Classic
Snake Game
Eat food to grow longer, avoid hitting yourself or the walls. Arrow keys or swipe.
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Puzzle
Coreball Game
Shoot balls onto the rotating core without colliding. Timing and precision.
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About Reaction Speed Test
Reaction Speed Test is a free browser-based platform for measuring and improving your cognitive performance. Every tool runs directly in your browser — no download, no account, no cost. Works on any device.
Our tests use the browser's performance.now() API for sub-millisecond timing accuracy. All scores are stored only on your device — we never collect personal data.