If you are looking for the best method to easily batch import PDF files into PNG images, then you can try the** CubexSoft** PDF to Image Converter that supports all Windows OS editions like Win 8, 9, 10, Vista, etc. With the help of this utility, you can directly convert PDF files into image formats i.e. GIF, TIFF, SVG, BMP, JPEG, etc. in high resolution without losing the picture format. You can maintain the official data with the perfect secured format and enhance the conversion skills by using its advanced features. It provides the demo version that permits to convert first 5 pdf per folder for free. But sometimes, you need to convert multiple PDFs into image formats so directly go with the licensed edition of the utility.
For More detail: https://www.cubexsoft.com/blog/convert-pdf-to-png-without-losing-quality/