MXenes, a unique class of two-dimensional in nature (2D) transition metal carbides, carbonitrides, and nitrides, have been identified as promising electrocatalysts for water-splitting purposes. Their exceptional electrical conductivity, high surface area, and tunable surface chemistry make them highly efficient for both the hydrogen (HER) and oxygen (OER) evolution reactions. Various modification strategies, including elemental doping, surface termination engineering, and heterostructure formation, have exhibited considerable improvement in their electrocatalytic activity. MXene-based composites with transition metal oxides, sulfides, and layered double hydroxides have significantly improved catalytic efficiency and stability. However, challenges such as oxidation susceptibility, structural degradation, and limited long-term stability need to be addressed for their practical application. Advances in synthesis techniques, defect engineering, and computational modeling are expected to optimize their performance further. This chapter presents a complete overview of MXene synthesis, properties, and electrocatalytic purposes in water splitting, showing their potential aimed at transforming clean energy technology.