PDF to Png PDF file is a portable document format. The document cannot be edited, and the layout is neat and easy to browse. When we are making presentations and want to reference tables or graphics in PDF, they cannot be copied. At this time, we need to convert PDF to image format. Generally, we convert PDF format to JPG or png format images. The advantage is that we can open them on any device. If we need to reference and insert images, we can.