KlanZ is a free, browser-based collectible card game that invites players into a shared online world described as a welcoming city and home. The game centers on collecting cards and building decks, with tools for browsing the card collection and using a deck constructor. Players can explore the in-game shop and boosters, and take part in card exchanges and trading through a marketplace, including deals and transaction history.

The site also provides features for gifts and communication, such as mail, notifications, and a community forum. For players seeking information, KlanZ offers a card database, statistics, news, frequently asked questions, game rules, and a feedback channel. Together, these features make KlanZ both a card-collection game and an online hub for managing a collection, assembling decks, trading with others, and keeping up with game information.

The service is presented as an online game accessible through a web browser, with registration available to users