The volumetric change caused by dehydration in cohesive soils, particularly in expansive soils, leads to the development of cracks on the soil surface. This can also happen due to the intrusion of leachate into the soil, leading to an increase in the permeability of the soil. The formation of such undesirable cracks is termed desiccation cracking. These cracks, when formed underneath the foundation, may lead to the differential settlement of structures built over such soils. The formation of a desiccation crack is a complicated process due to the interaction between the hydraulic and mechanical behavior of soil. In this study, the desiccation cracking in bentonite clay soils is investigated, and this problem is addressed using biopolymers, microcrystalline cellulose (MCC), and calcium alginate (CA) in various dosages. Results from the study show that the addition of both biopolymers MCC and CA arrests crack formation in bentonite. Also, volume change decreased along with radial displacement. An image analysis carried out to understand the desiccation cracking pattern of untreated and treated soil demonstrated the control of cracking with the addition of biopolymers. This study can be a useful input for the design of contaminant barriers where cracking can render the barriers dysfunctional.