I like the built-in viewer. You can probably also serve PDFs in an iframe since FF/Chrome/IE have built-in PDF viewers these days. In addition, if you'd like t

I like the built-in viewer. You can probably also serve PDFs in an iframe since FF/Chrome/IE have built-in PDF viewers these days. In addition, if you'd like to support picking files from cloud storage, I'd recommend checking out the Kloudless file explorer http://jsfiddle.net/pseudonumos/PB565/embedded/result/ http://jsfiddle.net/pseudonumos/PB565/embedded/result/ (disclaimer: I work at Kloudless)