Cracker is a modeling add-on for generating physical cracks and structural damage directly on 3D geometry. The tool operates primarily via hotkeys, providing a real-time viewport preview of the fracture pattern before applying the boolean operations to the mesh.

The add-on includes specialized modes for different types of destruction. The Stomper tool creates radial displacement impacts on horizontal surfaces, while the Breaker tool is designed for shattering flat objects like glass windows. Users can manipulate the damage parameters interactively, adjusting the rotation, noise scale, gap width, bending, and displacement amounts on the fly.

Additional features include a physics-based grounding system that uses rigid body simulations to automatically drop broken pieces onto a floor plane. Users can quickly delete small chipped fragments, stack multiple cracks without separating the base object, and automatically assign designated materials to the newly generated inside faces of the fractures.