NUT.md

A markdown editor that thinks along.

AI-assisted writing, bring your own API!

Open NUT.md →
Browser No install
API Bring your own
Soon Desktop app

Features

Everything you need to write well.

NUT.md is a browser-based markdown editor with built-in AI assistance. No account, no subscription — just write.

Multi-Model AI
Switch between OpenAI, Anthropic Claude, and other providers. Use the model that works best for your workflow.
Context-Aware Chat
The AI assistant reads your document. Ask questions, get rewrites, expand sections — all in context.
LaTeX Support
Inline and block math rendering via KaTeX. Write equations directly in your markdown and see them rendered.
Mermaid Diagrams
Render flowcharts, sequence diagrams, and more with Mermaid syntax. Diagrams live inside your document.
Citations & References
Manage footnotes and citations without leaving the editor. The AI can help format references in any style.
Browser-Based
Runs entirely in your browser. Nothing to install, no server, no account required. Your data stays on your device.

Bring your own API key. NUT.md does not store or proxy your API credentials. Add your key once in the settings panel and it stays in your browser's local storage — never sent to any server.

Desktop app

Or run NUT.md as a native Windows app.

Same editor. Double-click .md files to open. Works offline. Your files stay on your machine.

NUT.md desktop app preview showing the welcome screen with title bar Untitled - NUT.md
Coming soon · Windows first

The desktop app is launching shortly. In the meantime the browser editor above runs the same engine — open it, write, and the desktop release will be announced here when it ships.

Why the desktop app?

  • Native file association. Double-click any .md and it opens in NUT.md.
  • Offline first. No browser, no internet required.
  • Direct file access. Open and save files anywhere on your drive.

What's coming

  • mrNUT brand theme — light and dark, same look as this site.
  • Polished Windows chrome — themed title bar, drag region, native min/max/close.
  • Launch notification — follow updates on this page; release date will be announced here.