A Web-based tool for previewing websites at various resolutions, a simple iframe-based solution for testing responsive websites
It comes with predefined widths and a "disco" mode which constantly resizes the browser at various dimensions.
The app works out of the box, with no extra configurations needed. Just download, unzip, move it to a Web server, and access it via your browser.
Once loaded developers will be able to test to see how their projects look on mobile and tablet devices.