Expression Web SuperPreview is a web development application from Microsoft that enables developers to quickly and easily preview their webpages on different browsers and operating systems. It allows developers to inspect HTML, CSS, and JavaScript, as well as identify compatibility issues between different browsers. It also provides tools to optimize the design of a webpage and make it easier to debug and troubleshoot problems. SuperPreview also includes a range of features to help ensure cross-browser compatibility, such as the ability to compare two different versions of the same page, and to quickly identify and fix layout and design issues.
Discontinued The program is no longer updated. The latest version, v0.5.4, released in October 2014, can still be downloaded from the official website.