CrumbleHub, also known as Crumble Hub, is an information and planning resource for CookieRun: Crumble players. The site brings together game guides, community deck sharing, character references, tier lists, coupon information, and tools to help players make informed choices about team building and progression. Its deck builder lets users assemble teams from a catalog of cookies and pets, review active synergies, select a leader and leader cards, and share builds for activities such as stages, arena, daily dungeons, towers, and guild raids.

Players can also upload a deck screenshot for automatic lineup recognition, with image analysis performed in the browser rather than stored on the server. CrumbleHub features curated meta teams and user-shared recommendations, alongside cookie and pet indexes and role-based rankings. Its package-value calculator compares in-game bundles by converting listed rewards into a common crystal value, helping users assess relative purchase efficiency.

The site also provides game-related coupon checks and other practical resources, with interface options in multiple languages