The Material Design Guidelines are considered a living document by Google’s designers and receive constant updates and new additions. To help with their recent guidelines on responsive UI, Google has released a web-based tool to see what a website looks like on various devices and at different resolutions.
While the responsive UI guidelines are geared at apps, they can also apply to design on the web, particularly web apps. Users can enter a URL into the Resizer tool or select from a list of pre-selected sites that have good implementations of responsive design. Next to the URL bar, users can select different device views. The default view displays a webpage on laptop, tablet, and smartphone screen side-by-side.
Going into a specific view, users can select a specific width to view the webpage, with various pre-selected resolutions. The website views are fully interactive and can be scrolled. The specific pages loaded up keeps users logged into whatever sites they may already be in. Developers who are working on password protected sites will find this feature particularly useful.