Tungsten‐doped YBa2Cu3O7−xsuperconducting samples are characterized with the help of resistivity, crystal structural, microstructural, densityd, and critical current densityJcstudies for doping concentrations varying from 0.00 to 0.14 mol % of WO3. It has been found that doping of WO3has hardly any influence ofTc, whereas it seems thatdandJcare affected.dandJcof the samples increase in the range 0<WO3≤0.04, but above this range, both start decreasing. The maximumJcobtained at 77 K and zero magnetic field in YBa2Cu3O7−xdoped with 0.04 mol % of WO3is 450 A/cm2. The lower concentrations (<0.04 mol %) seem to improve the density, whereas higher concentrations lead to porous structure and also induce the formation of BaCuO2and Y2Ba1Cu1O5nonsuperconducting phase as revealed by scanning electron microscopy, energy dispersive spectral, and x‐ray diffraction analyses. The x‐ray diffraction analysis also showed no appreciable change in the lattice parameters with WO3doping. It appears that the WO3doping changes the microstructure of YBa2Cu3O7−xto influence itsJc.