Google has very recently implemented a PDF viewer inside Google’s popular email service - Gmail.

So next time you receive a PDF message in your email, Gmail gives you the ability to view the PDF without installing a PDF viewer like Adobe Reader.

Google PDF viewer

Google PDF Viewer Example

This is indeed an excellent addition to Gmail. I believe it would be even better if Google could provide an interface for browsing all our Gmail attachments, where a user will be able to find files and email them.