The developer tools in Chrome are a good starting point, you can emulate the screen size, user agent and orientation of a number of devices. A quick Google surfaced this article about the emulation: http://www.realeyes.com/blog/2014/02/19/a-quick-guide-to-chr...
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The developer tools in Chrome are a good starting point, you can emulate the screen size, user agent and orientation of a number of devices. A quick Google surfaced this article about the emulation: http://www.realeyes.com/blog/2014/02/19/a-quick-guide-to-chr...
Having a range of devices at hand helps too.