Fungal pathogens have a major impact on human health and agriculture worldwide, offering serious health hazards, especially to those with impaired immune systems, and causing up to 80% of agricultural losses. Alternative approaches to the management of fungal diseases must be developed to overcome these difficulties. Chemical fungicides and antifungal medications have traditionally been utilized; however, they can be harmful to the environment and human health. Despite their effectiveness, conventional fungicides and antifungal medications have drawbacks, such as toxicity, environmental issues, and the development of resistant fungal strains. Plant-derived nanoparticles provide a safer and more eco-friendly alternative to these standard treatments. The chapter delves into how these nanoparticles are generated, their modes of action, and their potential to combat fungal diseases. Plant-based nanoparticles are created from extracts of diverse plants that contain bioactive substances such as polyphenols, alkaloids, flavonoids, and terpenoids. These are abundant in medicinal plants and can be used to create nanoparticles in an environmentally responsible manner. By rupturing fungal cell walls and membranes, producing reactive oxygen species (ROS), and blocking important metabolic processes, these nanoparticles exhibit strong antifungal effects. However, obstacles persist in increasing production, guaranteeing safety, and proving their efficacy across various fungus species. Despite these obstacles, plant-based nanoparticles have enormous promise to alter the way we treat fungal infections. They provide a more sustainable and green approach to infection management, which benefits both the environment and human health. As research progresses, we may expect plant-derived nanoparticles to play a bigger role in fighting fungal illnesses, potentially presenting a viable alternative to standard therapies in the future.