Uno Online lets you play the popular Uno card game in your web browser. The aim of the game is to be the first player with no cards, similar to other Crazy Eights style card games. Play Uno Online with 2, 3, or 4 players. There are various strategies you can use to maximize your chances of winning at Uno. The main principle is to get rid of all your cards before everyone else. You do that by matching the color or number of the card placed down before yours. If you don't have a playable card, you must draw cards from the pile until you do.