Plastic-free agar obtained from marine seaweeds, specifically red macroalgae (Rhodophyta), is a sustainable food packaging option that protects food effectively and works in nature-friendly conditions. Natural packaging materials from agar contain two key components: agarose and agaropectin. These chemicals enable the red algae Gelidium and Gracilaria to create strong gels that hold moisture effectively. Agar packaging shows great potential as an eco-friendly alternative. Agar-based materials get more attention in sustainable packaging research for their use in films and coatings. These materials emerge from casting, extrusion, and molding processes and gain additional physical strength through blending with other biopolymer substances. The natural decomposition features of agar packaging maintain fresh food quality by preventing moisture loss and gas entry while staying non-harmful to consumers. The structural properties of agar packages provide necessary strength, flexibility, food preservation and water protection that allow these packages to serve many different kinds of food products. Food coating materials made from agar can stop harmful microorganisms from reaching the interior of food. Food packaging made from agar solves plastic pollution problems while keeping our food protected and safe. Future research on agar-based materials development will help us improve their use for preserving food and making sustainable packaging options.