Algae have garnered significant attention in the cosmetic industry due to their ability to synthesise a range of bioactive chemicals and secondary metabolites that are safe and non-cytotoxic to humans. Numerous secondary metabolites generated from algae are recognised for their dermatological advantages, including protection against UV radiation, antioxidant, anti-ageing, and anti-pigmentation characteristics as well as prevention of skin roughness, wrinkles, and laxity. While certain algal metabolites are now utilised in cosmetics, particularly as gelling and thickening agents, these organisms harbour untapped potential, serving not only as excipients and additives but also as a source of novel active ingredients. This chapter compiles information on several algal metabolites and their potential applications in the cosmetic sector, which may provide insights for future research.