ProseMirror vs Trix

ProseMirror is a toolkit for developers building rich-text editors on the web. It supports structured documents through a WYSIWYG-style interface while letting applications define document shape and content. Instead of treating a document as an HTML blob, it gives application code control over a custom data structure. Schemas and plugins provide ways to customize that structure and extend editor behavior. Four core modules handle the document model, editor state, view, and transformations; additional modules offer commands, key bindings, undo history, input macros, collaboration, and a basic schema. Multiple people can edit together in real time. Examples cover Markdown, image uploads, custom schemas, menus, code editors, footnotes, and track changes. ProseMirror is free, open source, and legally usable commercially; it can be self-hosted and is installed through npm. It works in recent Firefox, Chrome, Safari, and Edge versions, as well as Internet Explorer 11. It is a modular toolkit rather than a ready-made editor component, and implementation generally involves a bundler.

Trix is a free, open-source WYSIWYG editor for composing messages, comments, articles, and lists in web applications. It uses an internal document model that turns editing into operations and renders the result as terse, consistent HTML. Default formatting covers bold, italic, links, strikethrough, headings, quotes, code, and bulleted or numbered lists. Users can drop or paste files; the host application must upload them and supply permanent URLs. GIF, PNG, WebP, JPG, and JPEG attachments receive automatic previews. Trix supports unlimited undo and redo, form integration through a changing hidden input, and toolbar customization through events and data attributes. It sanitizes content with DOMPurify, while its documentation warns that directly inserted untrusted HTML can execute before sanitization. The editor supports accessible names through label, aria-label, and aria-labelledby attributes. It runs in evergreen desktop and mobile browsers and is available through npm, npm CDN, ESM, and UMD.