Resize!

Resize! is a lightweight and portable utility that you can use to resize pictures in batch mode. It supports multiple formats, including JPG, GIF, BMP and PNG.
Since installation is not a prerequisite, you can just save the program files to any location on the hard disk and run the executable immediately.
Alternatively, it is possible to move Resize! to a USB flash drive or similar storage unit, from where you can run it on any workstation effortlessly.
What's important to keep in mind is that no new entries are added to the Windows Registry, and leftover files are not kept on the hard disk after removal.
The interface is represented by a regular window that provides immediate access to all the main options. Loading a folder with pictures into the workspace is done using either the tree view or "drag and drop" method.
As far as export settings go, you can save the files as JPEG or PNG items, adjust the JPEG quality, increase the picture size automatically if it's needed, as well as make names web ready (optionally, enable DOS formatting mode).
When it comes to resizing images, Resize! offers three methods - proportional resizing (in percent or pixels), box resizing (set the maximum height and width) and independent resizing (set the width and height separately). There are no other notable options available through this app. After conversion, Resize! creates a new folder in the same location as the original one, with the resized images.
The application is not a concern to the computer's overall performance, as it uses a very small amount of CPU and system memory. It has a good response time, finishes a resizing job rapidly and delivers quality photos. No error dialogs have been shown in our tests, and the tool did not hang or crash. Thanks to its intuitive layout yet advanced settings, Resize! should please the entire audience.