Bulk Image Resizer Manager
The Bulk Image Resizer freeware is a simple image resizer that changes size of the images in a bulk way. Large sized images can be simply reduced into small ones. You enter the root folder name and scale ratio as inputs and all images in that folder (and optionally subfolders recursively) are changed by size and image type (converted to JPG format). You can also pass a file name prefix as an argument and your output image files will be renamed automatically.