Shape Key Smoother is an add-on that refines rough shape keys while maintaining the volume and underlying structure of the original 'Basis' shape. Unlike Blender's default Edit mode smooth operator or the Sculpt mode smooth brush, this tool prevents volume distortion and warping during the smoothing process. It also includes functionality to restore lost detail to shape keys that have been overly smoothed. The tool integrates directly into the right-click context menu and works with symmetry enabled.