A rich-text editor allows to edit, enter and format content in a web browser with rich markup and styles close to its final appearance.
A rich-text editor (RTE) allows a user or author to edit, enter and format content in a web browser with rich markup and styles close to its final appearance.
An online rich-text editor allows users and contributors of a website to use a WYSIWYG tool with minimal learning curve as their interface is close to the interface of a word processor for example.
Other rich-text editors are WYSIWYM tools (What You See Is What You Mean).