Tin oxide or SnO2 nanomaterials have acquired extensive applications in catalytic, electrochemical, and biomedical fields. These nanomaterials are of great importance nowadays, and they have gained immense attention due to their low cost, magnificent stability characteristics, increased photosensitivity, and other desirable features. In biomedical contexts, tin oxide has superb potential for numerous applications. It is biocompatible and shows antibacterial and antioxidant properties. This makes it an excellent candidate for combating bacterial infections and diseases related to oxidative stress. Such nanoparticles also promise to be developed into innovative therapeutics for the treatment of diabetes. They could be applied in wound dressings, medical implants, and antimicrobial coatings to prevent infections and to enable wound healing. They have also shown effectiveness in targeted therapy, regenerative medicine, and in diagnostics of diseases, thus improving the treatment results and providing the possibility of diagnosis at the earliest stages. Stannic oxide (SnO2) has also gained a requirement in tissue engineering scaffolds, drug delivery systems, along with imaging agents. Despite its promise, researchers still face challenges in fully understanding tin oxide’s biocompatibility, cytotoxicity profiles, and interactions with biological systems. Addressing these challenges will be pivotal in realizing the full potential of tin oxide in biomedical applications. Future research directions may focus on optimizing synthesis techniques, elucidating mechanisms of action, and exploring novel applications to further harness the benefits of tin oxide in advancing biomedical technologies and improving healthcare outcomes.