Entertainment & Fun

Measure your reflexes in milliseconds by clicking the instant the screen changes color.

Test your reaction speed and accuracy by clicking randomly appearing targets, right in your browser.

Roll dice, flip a coin, or make a random pick — a 3-in-1 fair decision simulator in your browser.

Paste a participant list and automatically split it into fair, random groups or teams.

Compose generative melodies with a 16-step visual matrix sequencer using Web Audio synthesis.

Visualize your life in weeks — see how much time has passed and how much remains, based on your birthdate.

Play piano instantly with your computer keyboard or touchscreen, with 4 selectable instrument tones.

Spin an interactive wheel to pick lunch, a winner, or a penalty — fair and fun.