Link: http://design.google.com/resizer/
functions are
1. All device view
2. Desktop view
3. Mobile view
1. All device view
This function show designs in mobile, desktop.
2. Desktop view
Desktop view [840 x height]
Desktop view [1280 x height]
Desktop view [480 x height]
3. Mobile view
Mobile view [360 x height]
Mobile view [1024 x height]
This google site can help make dynamic web application.
I think this site good for web developers.
