The ENFiber COST Action addresses the challenge of food processing waste by transforming it into high value fibers using innovative and sustainable methods. This initiative meets the environmental and societal demand for waste reduction and circular bio-economy solutions. With food by-products often discarded or underutilized, ENFiber unlocks their potential by promoting scalable green extraction technologies and implementing advanced characterization techniques. The main challenge is to scale fiber production from food processing waste, making it both commercially viable and environmentally sustainable. To achieve this, ENFiber will identify fiber-rich waste streams, explore non-destructive analytical methods, develop extraction methodologies to maximize yields, assess the environmental impact of the processes, and pursue product development opportunities. Collaboration between researchers, industry, and policymakers will ensure alignment with regulatory frameworks and market demands. ENFiber is organized into Working Groups focused on extraction, characterization, product development, sustainability, and dissemination. The network will promote capacity building through training schools, Short Term Scientific Missions (STSMs), Virtual Mobility (VM) grants, and industry-academic partnerships, providing opportunities for early-career researchers to develop expertise and expand their networks. Aligned with the EU’s circular economy and Green Deal objectives, ENFiber promotes sustainable waste management and aims to contribute to the reduction of greenhouse gas emissions. It also supports global environmental goals by creating value-added products for the food, pharmaceutical, and packaging industries. ENFiber aims to deliver tangible outcomes such as new fiber-based products, market-ready technologies, and regulatory recommendations, contributing to sustainable food systems and reducing the environmental impact of waste