The valorization of agricultural wastes such as pumpkin peel generated from the foodprocessing industry through thermochemical conversion offers sustainable solutions forboth waste management and carbon cycling. This study aims to evaluate the physicochemicalproperties and environmental impacts of charcoals produced from pumpkin peelwaste (PPW), without the use of chemicals or pre-washing. In this context, pumpkin peelhydrochar (PPH) was produced by hydrothermal carbonization (HTC) and pumpkin peelbiochar (PPB) by pyrolysis. The systems were modeled according to a pilot-scale scenariobased on the processing of 100 kg of PPW, and the functional unit was defined as theprocessing of this amount. The properties of the products were determined by variousphysicochemical characterization techniques, and environmental impacts were analyzedusing Life Cycle Assessment (LCA). The results showed that PPH has a higher specificsurface area (16.35 m2 g−1) than PPB (9.80 m2 g−1), as well as a higher carbon content(76.18% for PPH and 66.07% for PPB). Furthermore, the environmental impact of PPH(16.42 kg CO2-equivalent/FU) is lower than that of PPB (32.33 kg CO2-equivalent/FU).Based on the obtained physicochemical properties, the potential of both materials as soilconditioners has been evaluated. The lower environmental impact values suggest thatPPH may be a more advantageous alternative in terms of sustainability. However, thisevaluation is not based on direct soil application experiments, and further applied studiesare needed to confirm this potential.