Image Tuner is a free batch image resizing, renaming, conversion, and watermarking tool with a super-intuitive and straightforward interface. Based on an extremely fast image processing engine, this award-winning software has a bare minimum of controls and will help you with the most typical image-related tasks. You can work with individual files and entire folders to resize, convert, rename and watermark images with surprising ease.
What's new in this version:
Version 3.6 has fixed bug with renaming images located in same directory.