Chris Coyier checks out Sizzy, Polypane et al and decides which suits him best.
There are a number of these desktop apps where the goal is showing your site at different dimensions all at the same time. So you can, for example, be writing CSS and making sure it’s working across all the viewports in a single glance.
Polypane is a browser built specifically for developing responsive websites. It can present typical device resolutions side-by-side (for example iphone SE next to iphone 7 next to iPad) but also has some nice features such as automatically creating views based on your stylesheet’s media query breakpoints.
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