A cost-free tool designed to alter the size of jpg image files.
Thankfully, the software has hooks in place that allow users to look for PNGs. This means that if you really want to add PNG support to csImageResizer, you can do so via the hooks that the tool provides. So, if you don't mind putting in a bit of extra work, it's definitely possible to use csImageResizer with PNGs.
Overall, if you primarily work with JPEGs, csImageResizer is a solid option. While it's not perfect, it gets the job done and does it well. If you're someone who needs PNG support, you may want to look elsewhere. However, if you're willing to put in the effort to add support for this file format, csImageResizer can still be a valuable tool.