We present a study of electrochromic (EC) devices based on WO 3 thin films with textured surfaces. Surface patterns were generated by electron gun deposition of WO 3 stripes (173-μm wide and 150-nm high) on a previously grown 'flat' WO 3 film, 150-nm thick. The films were characterized by SEM, XPS and FTIR. They are amorphous and near-stoichiometric and have a packing density of 0.8. The textured films were used for the fabrication of EC devices of the configuration: K-glass/WO 3 /1 M LiClO 4 in PC/K-glass. These devices were characterized by optical and electrochemical techniques such as transmission spectroscopy, cyclic voltammetry and GITT. They exhibit considerable reduction of transmittance in the visible with the application of a potential of 4 V for 30 s, stability and reversibility of their electrochromic properties with an open-circuit memory of more than a week. Compared to equivalent EC devices with 'flat' WO 3 films, the textured ones exhibit nearly double diffusion coefficient for Li + and up to 30% more current during cyclic voltammetry tests. Hence, they present a significant improvement over 'flat' films, due to better access of Li ions into the WO 3 matrix. The textured WO 3 films are suitable for EC applications as they exhibit sharp contrast between regions with different shades of blue in the colored state. Other more complicated texture patterns are possible.