ClauseLens

Contract Review That Thinks Like a Lawyer

ClauseLens is an AI-powered contract comparison tool that helps users analyze changes between two versions of a legal document. Upload your original and revised contracts to receive a complete risk report — every change detected, risk-scored, and explained in plain English.

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✨ Features

• 🔍 Detects changes between two contract versions
• ⚠️ Risk scoring system: CRITICAL / MODERATE / MINOR
• 💬 Explains legal changes in plain English
• ✅ Smart recommendations: Reject / Negotiate / Acceptable
• 📄 Supports PDF, DOCX, and TXT files
• ⚡ Fast contract analysis powered by AI
• 🔒 No login required
• 🧠 Clean and modern UI with smooth UX

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🚀 How It Works

1. Open the application
2. Upload your original contract
3. Upload the revised contract
4. Click Analyze My Contract
5. Review the generated risk report and recommendations

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📂 Supported File Formats

• PDF
• DOCX
• TXT

Maximum file size: 10MB per file

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🛠 Tech Stack

• Framework: Next.js 14 (App Router)
• Frontend: React + Tailwind CSS
• UI Components: shadcn/ui
• Animations: Framer Motion
• AI Model: Anthropic Claude (claude-sonnet-4-20250514)
• PDF Parsing: pdf-parse
• DOCX Parsing: mammoth.js
• Deployment: Vercel

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🧪 Getting Started

1 — Clone the Repository

git clone https://github.com/your-username/clauselens.git
cd clauselens

2 — Install Dependencies

npm install

3 — Configure Environment Variables

Create a .env.local file in the root directory and add:

ANTHROPIC_API_KEY=your_api_key_here

4 — Run the Development Server

npm run dev

Visit:

http://localhost:3000

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🧳 Deployment

ClauseLens can be deployed on any Node.js-compatible hosting platform, but Vercel is recommended.

Deploy on Vercel

1. Push your project to GitHub

2. Import the repository into Vercel

3. Add ANTHROPIC_API_KEY in:

   • Project Settings → Environment Variables

4. Deploy the project

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📁 Project Structure

src/
├── app/
│   ├── components/
│   │   ├── Upload/
│   │   ├── Analysis/
│   │   ├── Report/
│   │   └── UI/
│   ├── api/
│   │   └── analyze/route.js
│   └── utils/
│       ├── extractText.js
│       ├── compareContracts.js
│       └── riskAnalysis.js

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👥 Team

Name	Role
Amanullah	Architecture, AI pipeline, deployment
Fahad	API integration, backend logic
Khizra	File upload, PDF/DOCX parsing
Sehr	UI/UX design, landing page
Shafia	Documentation, product communication

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🧠 Notes

• No user authentication required
• No contract data is permanently stored
• Files are processed in-memory only
• Designed for hackathons, legal-tech demos, and rapid contract analysis

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📬 License

MIT — Free to use, modify, and improve.