Fuente: Citrus Byproducts Extraction The increasing environmental concerns seen with plastic pack waste have accelerated the demand for sustainable food packaging solutions. Among bio-based alternatives, cellulose nanofibers (CNFs) have developed as favourable materials due to their exceptional mechanical properties, biodegradability, and renewability. CNFs are derived from plant biomass and processed into nanoscale fibers with high strength, flexibility, and excellent barrier properties, making them suitable for food packaging applications. This chapter explores the production techniques of CNFs, including mechanical, chemical, and enzymatic methods, and their impact on material functionality. The structural characteristics and physicochemical properties of CNFs, such as surface area, water retention capacity, and film-forming ability, are discussed with their packaging potential. Integrating CNFs with biopolymers and active compounds enables the development of functional packaging materials with antimicrobial and oxygen-scavenging properties, enhancing food quality and shelf life. Despite their advantages, CNFs face challenges such as high production costs, moisture sensitivity, and regulatory barriers, which limit their large-scale commercialization. However, advancements in surface modifications, hybrid material formulations, and innovative processing techniques, including nanotechnology and 3D printing, are facilitating the way for improved CNF applications. Collaborative efforts between academics, industry, and policymakers are crucial for addressing these challenges and facilitating the widespread adoption of CNF-based packaging.