Carbon quantum dots (CQDs) have emerged as a sustainable nanotechnology with transformative potential in food preservation. Derived from renewable sources through green synthesis methods, CQDs exhibit unique properties such as strong photoluminescence, antimicrobial activity, UV absorption and surface functionalization. These attributes enable their integration into smart packaging films and edible coatings, enhancing mechanical strength, barrier performance and shelf-life extension of fruits and vegetables. By combining environmental friendliness with functional versatility, CQDs offer a promising solution for safer, longer-lasting produce and contribute to the advancement of intelligent food safety systems.