Brain Games
A free collection of brain games to measure and train your reaction time, memory, and focus. Play instantly in your browser, no sign-up required.
Brain Games is a free collection of browser-based brain games you can play instantly with no sign-up or installation. Measure and train your cognition with a reaction time test, memory game, and number memory test.
Every measurement runs entirely in your browser; results are never sent to or stored on a server. Scores are for fun and reference only.
Brain Game Collection
Reaction Time Test
Click the moment the screen turns green to measure your reaction speed in milliseconds (ms).
Memory Game
Repeat an ever-longer pattern of lit tiles in order to train your short-term and working memory.
Number Memory Test
Memorize a number shown briefly and type it back; each round adds one more digit to raise the challenge.
Brain Game Guides
Why Use Brain Games
- Free & no install — Play instantly in your browser with no sign-up or app download.
- No personal data collected — Every measurement runs in your browser and results are never sent to a server.
- Mobile optimized — Touch, mouse, and keyboard are all supported for accurate results on any phone.
- Fun & self-check — Use scores to casually gauge your condition and compare records with friends.
All scores are for-fun reference figures that vary with your measurement environment (device performance, display latency, input method) and are not a medical diagnosis or formal cognitive assessment.
Last updated: 2026-06-25