BestImage

BestImage is a very simple-to-use program which allows you to view and convert image files to the BMP, JPG and ICO formats.
This is a portable software, so you don't have to install BestImage. It means that you can store it on a removable drive, plug it into any computer and directly run its executable file. Also, your Windows registry keys will not be affected.
The interface of the application is plain and simple to navigate through. Thanks to the Explorer-based layout, you can easily locate and access image files on your hard drive.
So, you can switch to full screen mode, rename files, create a slideshow and adjust the slide speed, stretch images, toggle between the file list and thumbnail view, set pictures as wallpaper, enable BestImage to overwrite existing files (in case of conversion), and more.
The image processing tool requires a very low amount of system resources (which can be barely noticed), has a good response time, quickly finishes a conversion job and manages to keep a good image quality. An error popped up during our tests after accessing the "Options" area but it didn't interfere with the overall functionality of the program.
All in all, BestImage doesn't have any outstanding features but it can be easily used by individuals of any experience level. We suggest you test it for yourself to see if it matches your preferences.