Convert or resize pictures even in multiple folders, with Light Image Resizer
Light Image Resizer (former VSO Image Resizer) is a free (for personal use, but with nags) and very convenient and effective application that will let you right click on your images and resize, optimize and or convert them. You can save your images with a new name or replace the original ones.
If you make a search in several subfolders and right click on the search results, the program will resize all the images saving each one of them on its original folder, if you want it to.
Features: Compress, convert, and create copies of your pictures * A fast batch image resizer * High quality image resize filters – cubic and lanczos for quality, and linear for speed * Create and e-mail friendly images or use them for web publishing * Rename, sort or add a watermark * Profiles – for ipad, iphone, forum, HQ * Create custom pdf pages * Convert Jpeg to pdf
Light Image Resizer is one of the very best programs you can find for this task.