HAML Editor is a free Chrome add-on designed for rapid web application development using HAML. It features real-time preview capabilities, allowing users to see the HTML output as they code. The tool includes code completion to streamline the coding process, eliminating the need for a boilerplate HAML file before starting a project. This facilitates a smoother workflow for developers who want to quickly prototype or create HAML-based applications.

In addition to its coding features, the HAML Editor provides a documentation panel that can be accessed easily if the browser window is sufficiently wide. This panel serves as a quick reference guide, ensuring that users have the necessary information at their fingertips while working on their HAML creations. Overall, the HAML Editor enhances productivity and efficiency for web developers.