Cellulose nanocrystal is the form of cellulose in the crystalline form. It is mainly extracted from the woody biomass. However, it is mostly converted into solid, liquid and gel form for different applications. Cellulose nanocrystal has key features that give it a pivotal role in advance technology such as it has high strength, large surface area, and electro-magnetic response. Apart from this, its wide range applications include enzyme immobilization, biosensing, synthesis of drug carriers in therapeutic, green catalysis, and synthesis of antimicrobial and medical material. Besides, if you add cellulose nanocrystal to a material, then it provides strength and stiffness to that material. So, cellulose nanocrystal offers threefold resistance to stress. Similarly, it changes the surface of a paper-like material. The cellulose nanocrystal is effective under the magnetic and electric fields, so it becomes filler in magnetic paper and other electronic products such as electronic memory cards and readers, etc.