Rich text editors
Downloadable componentRichTextBox
AI-ready Word-class editor for ASP.NET Core
RichTextBox is a professional WYSIWYG editor for ASP.NET Core that integrates through a simple tag helper. It adds AI assistance, real-time collaboration, Word-style track changes, threaded comments, and HTML/JSON/Markdown round-tripping. It ships as a self-hosted component with a one-time perpetual license starting at $129.
What you get
Key capabilities of RichTextBox.
AI Toolkit
Built-in Ask AI, AI Chat, and AI Review work with OpenAI, Anthropic, and Azure OpenAI.
Real-time Collaboration
Yjs CRDT-backed multiplayer editing shows live cursors, avatars, and presence.
Document Review
It supports Word-style track changes, threaded comments, and revision history with diffs.
Format Round-trip
Content converts cleanly between HTML, JSON, and Markdown.
Official site
Full documentation, live demos, and support live on richtextbox.com.
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