A log splitter attachment for attaching to a machine such as an excavator or backhoe boom to facilitate splitting of large diameter logs into multiple triangular wedges includes a central portion and an attachment portion coupled to the central portion such that the central portion is designed for attachment to the boom arm of a machine such as a back hoe or excavator. A plurality of planar sections is coupled to the central portion. The planar sections are arranged to extend radially outward from the central portion. A plurality of distal wedge members is provided. Each distal splitting wedge member is coupled to a respective one of the plurality of planar sections. A central wedge splitting member has a plurality of radial wedge portions. The central wedge splitting member is coupled to a base of the central portion.