You can use online tools such as Altoconvertpdftopng.com - Convert your PDF documents to PNGs in seconds. Any doc may be changed to a PNG by dragging and dropping it into the box above. Delete the converted data to start over.
You may be getting the image you asked for by simply selecting the image format (JPEG or PNG) and then choosing the value in the “Resolution” option. If you want to convert a PDF file to PDF, you can go straight from Preview to Preview Plus and click the PDF button under File new ‣ File ‣ PDF. When you go to Open in Preview Plus, you'll see PDF images for the images that you select or add as PDF. When PDF is being used for viewing, it will also allow you to add a photo and save it as a vector image. If you select the picture, select add then choose your folder to save to and click save As‸. For the photo, you will be given a choice of a JPEG or a PNG from the available options, and then you'll be given the choice between.