There are numerous platforms and websites that provide online versions of the game but uno online is the best. You can play UNO with friends or players from across the world with these online versions. While some platforms demand that you register an account, others let you play as a guest.
To play this online game, you normally log into a lobby or virtual gaming room where you can start new games with other players or ask friends to join. Most online card games follow the same rules and gameplay mechanics as their analog counterparts, with some platforms adding extras like chat facilities or themed card decks.