Halophytes are well known for their rich phytochemical reservoirs, including unique organic and inorganic osmolytes, synthesized inherently to adapt to the multitude of stress factors. These unique secondary phytoactive chemicals enable halophytes to survive in harsh environmental conditions and maintain the normal physiological metabolism of cells. Halophytes have nowadays become a pivotal player in the dynamic landscape of phytonanotechnology, wherein a diverse array of nanoparticles synthesized from these groups of plants have versatile applications. The utilization of halophytes as dual-purpose agents for capping and reducing opens up significant potential for the creation of nanoparticles. Halophyte-derived phytonanoparticles are characterized by their environmentally benign properties and high biocompatibility and cause only minimal or no hazard to living beings. Moreover, these biologically synthesized nanoparticles demonstrate greater therapeutic efficacy, demonstrating their potential to transform medical interventions. Their inherent antibacterial and anticancer qualities have categorized them as essential components of contemporary medicine, offering novel therapeutic approaches and focused interventions. Beyond their biological applications, these nanoparticles have a significant favorable impact on agricultural development and abiotic stress tolerance of various crop plants. The interaction of nanoparticles synthesized from halophyte with other plant-derived substances points to a future where nature and technology will work together to create previously unheard-of solutions to difficult problems.