Recent advances in cancer immunotherapy have highlighted the promise of off-the-shelf chimeric antigen receptor (CAR)-T cell therapy. This has offered solutions to key limitations of conventional autologous approaches, such as patient-specific cell collection and lengthy production times. This review summarizes the development, clinical application, and challenges of CAR-T cell technology. We reviewed CAR design and function, cancer-targeting mechanisms, and approaches to developing universal donor platforms that could replace the need for patient-specific cell harvesting. We discussed key challenges of CAR-T technology and its potential solutions. This review also summarizes CAR-T cell therapies recently approved by the FDA. Finally, we explored future directions, regulatory challenges and the potential of personalized medicine, emphasizing how off-the-shelf CAR-T therapies could revolutionize cancer treatment by making it more scalable and accessible.