Lexxy is a modern rich text editor designed specifically for Rails applications. Developed by 37signals, it is built to integrate directly with Action Text, providing a drop-in replacement for Trix and generating the canonical HTML expected by Rails. The tool is open source and available under the MIT License.
The editor focuses on delivering clean HTML semantics, ensuring that paragraphs and other elements are represented with appropriate markup. Lexxy supports Markdown shortcuts, allowing for inline formatting and automatic conversion on paste without leaving the editor. Real-time syntax highlighting is available for fenced code blocks, enhancing the experience for users who work with code within their documents. Additional features include smart links, which enable users to paste a URL over selected text to instantly create links, and attachment previews, allowing users to view PDFs and videos directly inside the editor. Image galleries can be displayed in a grid layout with full drag-and-drop support, and there is a robust interface for creating and editing tables.
Lexxy also offers configurable prompts, including mentions and interactive prompts with flexible loading and filtering options. The editor is extendable, supporting custom extensions so developers can write their own behaviors. Customization is further facilitated by its implementation in vanilla JavaScript and CSS, making it adaptable for a variety of Rails web applications.
The tool is powered by Lexical, Meta's extensible text-editor framework, which underpins its feature set and flexibility. Lexxy is suitable for developers and teams building modern Rails-based products who require a rich text editing solution that respects markup and user experience. Its open-source MIT licensing makes it accessible for integration and further development within the Rails ecosystem.
In the IDEs & code editors space, Lexxy takes a focused approach. It focuses on adding modern, extensible rich text editing to Rails applications with clean HTML and advanced features. Lexxy is an open-source project aimed at rails developers. The project is open source (MIT). The product ships for the web.
It is developed by 37signals, and the product first shipped in 2025. The project is developed in the open on GitHub with 1.1k stars and 370 commits in the last 90 days. Among its 10 catalogued features are markdown support, code highlighting, and attachment previews.
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Lexxy – A modern rich text editor for Rails verified by the PulseGate indexer
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