Tableau is an excellent latest generation visualization tool that is only limited by our creativity. The fact that Tableau provides a free version of the software (download from the menu above) only makes it more appealing for professionals and enthusiasts the same way. Once we have the Tableau Public version installed, we can only save to the Tableau Public database and not in any other formats. However this can be overcome by the steps below.
Once saved to Tableau Public, visit the URL of the visualization. There at the bottom of the visualization you will find icons for Share, Download, Full Screen, Reset etc, on clicking Download you will be prompted to choose your export format with preferred settings. We get the options to download as Image, PDF or PowerPoint - pretty much sufficient for basic needs. This is assuming the Download was not restricted by the owner of the visualization.