BlueGriffon

BlueGriffon is a graphical editor for creating and editing web pages and EPUB e‑books. It provides a visual interface that lets users design HTML content and assemble EPUB publications without writing code manually. The application runs on macOS and is considered stable for production use.

The tool is aimed at web designers, content creators, and authors who need a WYSIWYG environment for web and e‑book authoring. Its long development history, tracing back through Netscape and Nvu, reflects a foundation built on Mozilla technologies.

After more than two decades of development, the original maintainer announced the project’s end of active development, indicating that the source code will be released for community rebuilding or revival. This legacy background and the planned open‑source release distinguish it from newer, purely online editors.