Before you read - Taritsyn/BundleTransformer GitHub Wiki

Before you read the Bundle Transformer's documentation, I recommend you to read the “Bundling and Minification” chapter of “ASP.NET MVC Guidance” and “Microsoft ASP.NET Web Optimization 1.1.0 Release Notes”. Also recommend you to read the Rick Anderson's posts about using of Microsoft ASP.NET Web Optimization Framework with Web Forms and Web Pages.

Bundle Transformer does not minify HTML markup, embedded/inline styles and scripts. For these purposes it is recommended to use WebMarkupMin.