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In-App Preview

Artifact Panel

Edit, preview, and run files without leaving the conversation.


Marnie includes a Claude-like side-by-side Artifact Panel for creating, viewing, editing, and previewing files in the browser while maintaining active conversations. HTML runs in a sandboxed iframe, Markdown renders GitHub-flavored, math equations render via KaTeX, and diagrams render via Mermaid.js.

Key capabilities

  • HTML applications in a sandboxed iframe with live DOM rendering
  • KaTeX for inline and display LaTeX math equations
  • Mermaid.js for flowcharts, state machines, and architecture diagrams
  • GitHub-flavored Markdown viewer with real-time preview
  • Save edits back to workspace/ or download with one click