Braincheck — a free online brain test

Braincheck is a free online brain test with thirty short interactive cognitive games measuring memory, reaction time, logic, attention, focus, visual processing and decision making. Everything runs in your browser — no sign-up, and your results never leave your device.

What the cognitive tests measure

Reaction time — respond the instant a target appears.
Memory — recall digits, sequences, objects and lit grids.
Logic & patterns — number sequences, visual patterns and short puzzles.
Visual attention — spot odd symbols, track peripheral targets, find hidden numbers.
Focus & impulse control — hold rhythm, juggle two tasks, stop at exactly the right moment.
Decision making & flexibility — weigh risk, switch rules mid-game, sort under time pressure.

Results are an estimate of your performance on these mini-games — not a medical diagnosis or a clinical IQ test. Every retry generates fresh randomized challenges.

Note: JavaScript must be enabled to play the interactive brain tests.

About · Privacy Policy · Terms of Service · Contact