Mercury comes bundled as a Rails Engine, so just include it in your Gemfile. Or download the current bundled package if you're not using Rails.
Easily add or remove toolbar items or create entirely new tools. Any toolbar item can be tied to an action using behaviors and the command pattern.
Full HTML, Simple, Markdown, Snippet and Image regions are supported by default, but you can just extend the base regions to build your own types.
Built for and maintained by the community via GitHub. You can track or report issues, contribute code or translations, and keep up with the project.
All browsers that implement the complete W3C contentEditable specification are supported.
Full HTML markup that utilizes the HTML5 contentEditable feature. These are the core of what Mercury Editor does, and provide the most flexibility.
Plain text, newlines and markup aren't allowed. Appropriate for titles, headlines, or any area where you want just the content and not the styles.
Based on the Github flavored Markdown syntax. These are useful if you want to keep the markup flexible, while still clean and simple.
Allows snippets but not content. Snippets are chunks of reusable markup or code defined by a developer and can be placed into content later.
Only applied to image tags, it results in the image being drag-and-drop replaceable. Great for images you don't want within content regions.
When the provided regions don't give you what you need, create your own based on your specific needs. You'll be the most appreciated developer.
Preview content while you're working to see exactly how it'll look.
Built in low profile translation and internationalization system.
Insert and edit links, including TOC & Bookmark links.
Insert and edit images, youtube videos, and vimeo videos.
Advanced visual table editing and creation within content.
Insert predefined reusable bits of markup using drag and drop.
Drag images from your desktop to automatically uploaded and insert them.
Build from the existing HTML, markdown, snippet, simple, and image regions.
Build on top of Rails and the asset pipeline. Watch the RailsCast for an introduction.
Released under the MIT License so you can do what you want.
Made with love, contributed to by many amazing developers and designers.