Dyes are coloring agents widely used in the textile and leather industries. Synthetic dyes are the major contributor to global wastewater exhibiting toxic effects on humans, aquatic organisms, and the environment. The conventional decolorization treatments are less effective due to high dye concentration in wastewater, complex chemical structure, and poor biodegradability. Several strategies like physical, chemical, and biological were reported earlier for dye decolorization. However, the adsorption technique has been extensively considered from economic and ecological standpoints. Biochar, a carbonaceous material generated by pyrolyzing waste biomass has been discussed here to tackle the dye-containing wastewater. As an adsorbent, biochar has gained considerable attention owing to its underlying advantages like larger surface area, high porosity, low production cost, varied surface functional groups, easy surface modifications, exceptional hydrophobicity, and aromaticity. In this chapter, we have discussed approaches for the production, and characterization of the biochar. Furthermore, we have also considered the effect of different physicochemical properties, sorption kinetics, isotherm models, and other key factors affecting the sorption mechanism. In this perspective, an effort has been made in this chapter to explore the probability and practicability of biochar as a sorbent for removal of the textile dyes.