Duel Masters Hub is a web-based toolkit for players of Duel Masters, designed to make deck testing and preparation convenient on both computers and smartphones. Its central feature is a free solo-play simulator that recreates the feel of a real game, letting users test opening hands, mana development, and combo sequences directly in a browser. The simulator supports key game areas, including hand, mana, shields, battle, graveyard, deck, and the extra-dimensional zone, as well as shuffling, drawing, and mana operations.

Players can undo actions and repeat tests freely, or load two decks at once to examine matchups, including in the Advanced format. Beyond solo practice, Duel Masters Hub provides tools to create and manage decks, search public decks shared by other players, and record match results with win rates and performance trends. It also offers a community feature for predicting future restrictions and viewing the leading predictions.

By bringing deck building, simulation, discovery, and tracking together, the service helps Duel Masters players refine their strategies and explore how their decks perform