<p>Flexible electronics, including wearable devices, foldable displays, sensors, and energy storage solutions, are revolutionizing modern technology. This review emphasizes halogen-free polymer composites as sustainable alternatives to traditional flame-retardant materials. These composites provide superior performance, including enhanced mechanical strength, thermal stability, and electrical conductivity, while addressing environmental concerns. By incorporating advanced nanomaterials and novel fabrication techniques, halogen-free composites demonstrate their potential in flexible electronics applications. The review identifies knowledge gaps, such as long-term stability and scalable manufacturing processes, and explores future research directions to advance the field further.</p> Graphical Abstract <p></p>