Rapid increase of global population, escalating energy consumption, and severe climate change led to think about future energy security. The greenhouse gas emissions through excessive use of fossil fuels and their limited resources, compelled scientific community to find out replacement of fossil fuels. Molecular hydrogen stands out to be one of the replacements which can revive the threat for future energy security. Among several methods of hydrogen production, water splitting is one of the cleanest ways to produce hydrogen, accomplished through three methodologies: photocatalysis, electrocatalysis, and photoelectrochemical process. This chapter initially elucidates basic mechanisms of these three processes for hydrogen generation through water splitting. It then focuses on the role of lead-free perovskites, exploring both halide and oxide systems across all three methodologies. Thereafter, different strategies including foreign element doping, vacancy engineering, surface engineering, encapsulation strategy are introduced to improve the performance of oxide and halide perovskites separately for water splitting application. Finally, this chapter outlines the potential of lead-free perovskites for hydrogen generation via water splitting. In summary, this chapter offers a thorough analysis of current state of art lead free perovskites and their performances, future design strategies for further improvement in performances for hydrogen generation through water splitting.