Here you can test responsive design for the most frequently used devices (iPad - landscape, iPad - portrait, small tablet and iPhone).
Besides the websites we chose as "favorites", you can test absolutely any site by entering URL and pressing "GO" button.
We can't guarantee that this test is 1:1 with the devices we mentioned, however all websites we tested had the same result.
We would be happy to hear from you in terms of your feedback, so we could improwe our work and correct our mistakes regarding this tool.
You can send us your feedback on our facebook page .
If you think your website looks good in responsive design you can share it with your friends via facebook simply by
adding "?url="www.your-domain.com" at the end of url above, for example