If you need to create maps for a large number of images, this application is certainly a great choice. You can import every source file at once, and the program even supports drag and drop.
Normalmap Generator allows you to work with images saved to multiple formats, namely, PNG, JPG, TIFF, BMP, PPM, XPM, TGA and QIF. You can also specify which maps should be exported before launching the operation.on here]Normal, specular and displacement maps are used in modeling to enhance the appearance of objects without creating additional polygons, as well as to control the reflectivity of surfaces.
Normalmap Generator is an open-source application that can help you generate all these types of maps for multiple image textures in one operation. It offers some interesting features, and it is quite easy to use.