Lignocellulosic biomass (LCB) is the most abundant renewable bioresource on earth that offers a promising sustainable and eco-friendly alternative to petrochemical-based raw materials for the production of renewable energy. Despite its abundance and wide availability from different sources such as forest and agricultural residues, grass, and energy crops, its contribution to the energy sector remains insignificant. This could be attributed to the absence of economically feasible and industrially applicable processes and technologies for converting LCB. The pretreatment stage of LCB is the most important but a difficult process consuming about 40% of the total processing cost. Various pretreatment methods have been explored in recent years, including physical, chemical, physicochemical, and biological approaches. In this regard, research is currently focused on identifying effective, low-cost, and environmentally friendly pretreatment methods for converting LCB into biofuels and other biomaterials. As a result, there is growing interest in investigating recent advancements and emerging technologies in the area, as they have not been thoroughly examined in the current body of literature. The review aims to provide an overview of existing LCB pretreatment techniques, with a focus on the latest innovations. The objective is to enhance the understanding of these developments and encourage further research into new strategies to design and develop suitable and sustainable solutions for improving biomass conversion processes in biorefineries.