BuilderJS is a jаvascript plugin which provides a web user interface for building / editing HTML emails or web pages. BuilderJS is the easiest, quickest way to design elegant, mobile responsive emails or pages for your business. BuilderJS is made in pure jаvascript and HTML, making it easy to integrate with any web application no matter what the backend programming language is (Java, .Net, PHP, Ruby on Rails, Python, etc.)