One of the most important substances in organisms, carbohydrates perform a variety of functions, including those related to the extracellular matrix and substances that are involved in energy. The simple diafiltration technique can be used to create nanoparticles with carbohydrate chains on their surface. The current method produced nanoparticles with a one-step process, small size, narrow size distribution, high yield, and no aggregation formation. Protein nanoparticles are formed from a variety of peptide biopolymers, including collagen, albumin, keratin, sericin, fibroin, gelatin, and collagen, whereas polysaccharide biopolymers like chitosan and alginate are primarily used to make carbohydrates. Advanced techniques like coacervation, electrohydrodynamic atomization, emulsification, and desolvation are used to precisely produce nanoparticles based on green biomacromolecules. Biopolymeric nanoparticles can now be used in a wide range of biotechnological applications due to the advancement of innovative methods such as atomic force microscopy, transmission electron microscopy, scanning electron microscopy, dynamic light scattering, and X-ray diffraction, Fourier transform infrared spectroscopy, and UV visible spectroscopy.