Slate
Slate is a completely customizable framework for building rich text editors. Slate lets you build rich, intuitive editors like those in Medium, Dropbox Paper or Google Docs, which are becoming table stakes for applications on the web, without your codebase getting mired in complexity. It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what is or isn't in "core". You can think of it like a pluggable implementation of contenteditable built on top of React. It was inspired by libraries like Draft.js, Prosemirror and Quill. Slate is currently in beta. Its core API is usable now, but you might need to pull request fixes for advanced use cases. Some of its APIs are not "finalized" and will (breaking) change over time as we find better solutions. The most important part of Slate is that plugins are first-class entities.
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Mercury Editor
Mercury is a full featured HTML5 editor. It was built from the ground up to help your team get the most out of content editing in modern browsers. 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. We don't inject javascript or css into your production pages so you're free to use whatever frameworks you want without having to worry about conflicts. 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 on top of the HTML5 contentEditable features, it natively supports the all the fancy new HTML5 elements, syntax, and JavaScript APIs.
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Squire
Squire is an HTML5 rich text editor, which provides powerful cross-browser normalisation, whilst being supremely lightweight and flexible. It is built for the present and the future, and as such does not support truly ancient browsers. It should work fine back to around Opera 10, Firefox 3.5, Safari 4, Chrome 9 and IE8. Unlike other HTML5 rich text editors, Squire was written as a component for writing documents (emails, essays, etc.), not doing wysiwyg websites. If you are looking for support for inserting form controls or flash components or the like, you'll need to look elsewhere. However for many purposes, Squire may be just what you need, providing the power without the bloat.
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TinyMCE
TinyMCE gives you total control over rich text editing within any application.
As a WYSIWYG component, it can be seamlessly integrated into your web app's existing tech stack – and can be fully customized via its 400+ APIs and 12+ framework integrations or used out-of-the-box as an enterprise-grade editor.
TinyMCE premium plans include advanced features that are perfectly suited to enterprise-grade uses and even the most complex edge-cases. Three popular premium features:
1. AI Assistant: Generative AI = faster writing
→ Embed the power of AI inside your app with pre-written prompts
2. PowerPaste: 99.9% accurate copy-paste = less support tickets
→ Cleanly copy-paste from MSWord, GDocs, Excel, and other popular apps
3. Spell Checker Pro: Eliminate errors = consistent on-brand spelling
→ Check up to 13 languages (plus medical terms) and build custom dictionaries
Available in the cloud and on-premise. Easily integrates with React, Angular, Vue, Bootstrap and others.
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