Claude for Word

The AI-powered Microsoft Word Add-in that brings Claude directly into your documents

Features • Installation • Usage • Tech Stack • Contributing • License

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✨ Overview

Claude for Word is a professional Microsoft Word Add-in that integrates Anthropic's Claude AI directly into your writing workflow. Write smarter, faster, and more accurately — whether you're drafting contracts, polishing reports, or analyzing complex documents.

💡 Claude writes directly into your document — formatted, tracked as changes, and ready to use.

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🚀 Features

📄 Document-First AI

Feature	Description
Direct Insertion	Claude writes directly into your document, formatted and ready to use
Smart Context	Automatically reads your full document or highlighted selection
Track Changes	All AI modifications appear as Redlines — perfect for professional reviews
Real-time Streaming	Watch Claude compose your content token by token

⚖️ Legal & Professional Tools

Tool	Description
Contract Review	High-level analysis of clauses, risks, and obligations
Formal Reframing	Instantly rewrite text in a professional or legal tone
Legal References	Identify applicable laws and regulations (CC, D.Lgs., EU Regs)
Text Analysis	Readability metrics via Gulpease & Flesch-Kincaid indexes

🔒 Privacy & Security

• Local API Key Storage — Your key never leaves your browser
• Direct Connection — Calls go straight from Word to Anthropic's API (no middleman)
• Open Source — Fully auditable codebase for complete transparency

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🛠️ Installation

Prerequisites

• ✅ Microsoft Word (Windows, Mac, or Web)
• ✅ Node.js 18+
• ✅ Anthropic API Key

Step 1 — Clone the repository

git clone https://github.com/MorkMindy74/claude-word-addin.git
cd claude-word-addin

Step 2 — Install dependencies

npm install

Step 3 — Setup development certificates (required for HTTPS)

npm run dev-certs

Step 4 — Start the development server

npm start

Step 5 — Sideload in Word

1. Open Microsoft Word (Desktop or Online)
2. Go to Home → Add-ins (or Insert → My Add-ins)
3. Click Upload My Add-in
4. Select the manifest.xml file from your project folder

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📖 Usage

1. Open the Sidebar — Click the Claude button in the Word Ribbon
2. Configure API Key — Click the ⚙️ Settings icon and enter your Anthropic API Key
3. Choose a Model — Select your preferred Claude model (e.g., Claude 3.5 Sonnet)
4. Give an Instruction — Type a prompt (e.g., "Draft a non-disclosure clause") or select a Quick Action chip
5. Pick an Insertion Mode:
   • 🔄 Replace selection — Overwrite the selected text
   • ➕ Insert after — Append after the selection
   • 📄 Insert at end — Add to the end of the document

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🏗️ Tech Stack

Technology	Role
Office.js	Microsoft Word integration & document manipulation
Anthropic Messages API	Claude AI with SSE streaming
Vanilla JavaScript / CSS	Lightweight, zero-dependency runtime
Webpack 5	Bundling & development environment

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📁 Project Structure

claude-word-addin/
├── src/
│   ├── taskpane/          # Main sidebar UI (HTML, CSS, JS)
│   ├── modules/           # Core logic: AI client, document ops
│   └── commands/          # Ribbon button commands
├── assets/                # Icons and static files
├── catalog/               # Add-in catalog configuration
├── manifest.xml           # Office Add-in manifest
├── webpack.config.js      # Build configuration
└── .env.example           # Environment variable template

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🤝 Contributing

Contributions are what make open source amazing! 🎉

Please read our CONTRIBUTING.md for guidelines on:

• Reporting bugs
• Suggesting features
• Submitting pull requests

# Fork the project, then:
git checkout -b feature/your-amazing-feature
git commit -m 'Add: your amazing feature'
git push origin feature/your-amazing-feature
# Open a Pull Request

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📄 License

This project is licensed under the MIT License — see the LICENSE file for details.

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Made with ❤️ for legal professionals and writers everywhere

⭐ Star this repo if you find it useful!