Sizzy - Responsive Design Testing
Sizzy is a great online tool that shows what a web app would look like through several common mobile phones and tablets.
Some viewports you can test are:
- iPhone 4
- iPhone 5
- iPhone 6
- iPhone 7
- Samsung Galaxy S4
- Nexus 7
and more
How To Use it
It's as simple as going to the application and entering your URL of choice!

and bam!
