Editor.js is described as 'Block-styled editor for rich media stories. It outputs clean data in JSON instead of heavy HTML-markup. And more important thing is that Editor.js is designed to be API extendable and pluggable' and is an app in the development category. There are more than 25 alternatives to Editor.js for a variety of platforms, including Web-based, Self-Hosted, JavaScript, Mozilla Firefox and Linux apps. The best Editor.js alternative is Wordgard, which is both free and Open Source. Other great apps like Editor.js are TinyMCE, CKEditor, Tiptap and Eddyter .