I'm looking for gratis Windows software to bulk/batch convert thousands of PNG image files to JPG. The big requirement is that both the created and modified timestamps of the files must be maintained.
The software can be GUI or CLI. Either (or both) is fine.
A bonus will be the functionality to recursively traverse directories (folders) to process all PNG files within them.
Another bonus will be to allow the user to set the compression level for the JPG image output files.