Google (Gmail) rocks again with a new ultimate feature in Gmail. Now instead of downloading all the respective PDF attachment and viewing that in your desktop, you can view then and there right in the browser, and that to in a great viewing with some graphics. Just click “View” right next to your PDF attachment and enjoy the viewing of the same right in your browser. This feature is already implemented feature in Google Docs and now this has been introduced right here.
Still you can view in plain HTML for a link at the top of the new viewer even you can make use of download option provided there in Gmail.