The consequence of Cr doping on structural, optical and magnetic properties of Lead Tungstate (PbWO4) nanostructures produced by chemical precipitation method are inspected. Powder X-Ray Diffraction (XRD) analysis reveal the tetragonal structure of pure and Cr doped PbWO4 compounds. The appearance of metal oxide vibrations (Pb, W, O and Cr) is identified through Fourier Transform Infra-Red (FTIR) spectroscopy analysis. Electron microscopy images confirms the formation of double taper like shape in PbWO4 and the morphological changes induced by Cr ions in the doped compounds. Magnetization studies demonstrate that paramagnetic nature of pure compound and carrier induced exchange interactions which results antiferromagnetic phase transition in higher concentration of Cr doped PbWO4 samples. From the present investigation, tunability of magnetism with respect to the dopant concentration in PbWO4 system at room temperature leads the material for fabrication of magneto-optical devices.