Free Download Batch Image Converter 1.7.1 (x64) | 20.4 Mb
BatchImageConverter is a software that helps you to batch convert image files. It can work for many image types (*.bmp, *.gif, *.jpg, *.png, *.tiff, *.tif, *.psd, *.pcx, *.pbm, *.pgm, *.ppm, *.tga, *.tpic, etc.).

https://withdata.com/batch-image-converter/index.html