On our browser you can uploadt one PDF file at a time. After one file has been uploaded you will see the contents/pages in that PDF file. You will also see an Add More option, clicking on which you can add another PDF file which you want to convert into an image. The workspace allows you to delete as well as dowload individual files if you want to do so. Once you have added and deleted the PDF pages as required you can click on convert. All the pages in the uploaded PDF will be converted into image, once you click on convert.