Separating content from presentation is a powerful software design goal. While it’s a challenge for any interactive web application, it’s especially important for responsive and other multi-device sites. Transforms are a powerful and simple way to address these issues, yet they remain an underappreciated technology. As a result, web developers are liable to think transforms “don’t apply to me” even though they are working with HTML, a structured format ripe for transformation. Thankfully there are new transform frameworks on the horizon, including work by the inventor of Sass, that hold the promise of a revival. In this talk, Ishan will explore the power of transformation based approaches for separating content from presentation in the building of mobile websites and show their applicability for anyone who deals with HTML.