Viewport Tool

So how big is the screen?

When you are testing a web site on different devices (phones, tablets, laptops and PCs), it can get a bit confusing. How big is the viewport? – the actual bit of the screen that the user sees with your web site in it.

We found a handy bit of javascript, that works very nicely. Thanks to Ben Frain, author of a great book on responsive web design.

Viewport Tool

It works best as a standalone page – so here it is: Viewport Size.

NEW: If you find this useful, you might want to look at our Interactive Color Chart too!