About Mindzook

Mindzook is a free collection of 26 brain-training mini games and 118 handy tools that run entirely in your browser. No downloads, no accounts, no waiting — open a page and start playing or working.

What you'll find here

Our mini games train reaction speed, memory, visual perception, focus and logic — from a classic reaction time test to sudoku and water sort puzzles. Our tools cover everyday needs: unit converters, calculators, text utilities, image tools, generators and more. New games and tools are added regularly.

Everything runs in your browser

Every game and tool computes and renders locally on your device. Your files never leave your computer when you use tools like the image converters, and your scores stay in your browser unless you choose to submit them to a public leaderboard. That makes Mindzook fast, private and safe to use anywhere.

Original content

Everything on Mindzook — code, text, graphics and icons — is created by us. We build our games and tools from scratch, and we reference public standards (like official unit definitions and well-known test protocols) rather than copying anyone's work.

Free to use

Mindzook is free. If you have ideas for a game or tool you'd like to see, or you find a bug, we'd love to hear from you — drop us a line.