Annually, global food losses, including environmental conditions, harvesting, handling, and transportation, cost about one trillion dollar. Variations in food loss rates within countries are due to regional practices, packaging innovations, technology, economics, and infrastructure. Nanotechnology plays a crucial role in developing and solving packaging challenges, enhancing food quality and safety by minimizing waste during packaging, extending product shelf-life, and reducing chemical use. Modified atmosphere packaging (MAP) is one example of an advanced food packaging method that controls the levels of carbon dioxide and oxygen to increase the product’s shelf-life. Biodegradable and edible films with antimicrobial properties create tailored barriers designed to interact with treat spoilage agents, thus preserving food longer. Nanosensors, including humidity and gas sensors, monitor ripeness spoilage-indicating gases (such as carbon dioxide and ethylene) and moisture levels. The current chapter explores global technological applications in food packaging and their impacts on postharvest losses. It highlights how nanotechnology improves food safety, quality, and sustainability while offering solutions to packaging problems. Additionally, it delves into sensor-embedded packaging benefits and various nanopackaging types and their food preservation role.