PDF Helper AI 📄🤖

A modern, AI-powered PDF management and interaction platform built with Next.js and Express.js. Upload, analyze, and chat with your PDF documents using advanced AI technology.

✨ Features

• 🚀 AI-Powered PDF Chat: Interact with your PDF documents using advanced AI
• 🧠 Qwen2-VL-2B-Instruct Model: Local vision-language model for advanced PDF understanding
• 🤖 Multi-Model AI Integration: Google Generative AI + Qwen2-VL for optimal performance
• 📱 Modern UI/UX: Beautiful, responsive design with glass morphism effects
• 🔍 Smart Analysis: Extract insights and analyze PDF content with AI
• 📝 Note Management: Create and manage notes from your PDFs
• 🖼️ Image Extraction: Extract and analyze images from PDF documents
• 💬 Conversational AI: Natural language processing for interactive discussions
• 🎯 Context-Aware Responses: AI maintains conversation history for meaningful interactions
• 📊 Automated Summarization: Generate intelligent summaries of PDF content
• 🔐 User Authentication: Secure user management with JWT
• 📊 Dashboard: Centralized management of all your PDFs and notes
• 🌐 RESTful API: Well-documented API with Swagger/OpenAPI

🤖 AI & Machine Learning

Generative AI Integration

Our PDF Helper AI leverages cutting-edge generative AI technologies to provide intelligent document interaction:

• 🧠 Qwen2-VL-2B-Instruct: Advanced vision-language model deployed locally for superior PDF understanding and multimodal analysis
• 🌟 Google Generative AI (Gemini): Integrated for advanced reasoning, content generation, and multi-modal understanding
• 🔄 Hybrid AI Architecture: Combines the power of cloud-based GenAI with local custom models for optimal performance and privacy

Qwen2-VL-2B-Instruct Model Features

• 👁️ Vision-Language Understanding: Specialized model capable of processing both text and visual content from PDFs
• 📄 Document Analysis: Optimized for document understanding with 2B parameters for efficient local inference
• 🖼️ Image Comprehension: Advanced visual reasoning capabilities for charts, diagrams, and images within PDFs
• 💡 Instruction Following: Fine-tuned for following complex instructions and providing detailed responses
• ⚡ Lightweight Architecture: 2B parameter model optimized for local deployment with minimal resource requirements
• 🔒 Privacy-First: Runs entirely offline, ensuring document confidentiality and data security

Custom Model Features

• 📚 Vision-Language Processing: Qwen2-VL-2B-Instruct model trained for comprehensive document understanding
• 🏠 Local Deployment: Runs entirely on-premise for maximum privacy and data security
• ⚡ Optimized Inference: GPU-accelerated processing with model quantization for fast responses
• 🔒 Privacy-First: All document processing happens locally, ensuring confidentiality
• 🎯 Multimodal Understanding: Enhanced capability for processing text, images, charts, and diagrams in PDFs
• 📊 Efficient Architecture: 2B parameter model provides excellent performance with minimal resource usage

AI-Powered Features

• 💬 Intelligent Conversations: Natural language interface for document queries and analysis
• 📊 Smart Summarization: Automatic generation of key insights and executive summaries
• 🔍 Semantic Search: Advanced content discovery using vector embeddings and similarity matching
• 🖼️ Multimodal Analysis: Process both text and images within PDFs using OCR and vision models
• 🎨 Content Generation: Create structured notes, outlines, and reports from PDF content
• 🔮 Predictive Analysis: AI suggests relevant questions and topics based on document context
• 📈 Performance Optimization: Continuous model improvement through feedback loops and usage analytics

Technical Implementation

• Qwen2-VL-2B-Instruct: Local vision-language model for document understanding and analysis
• LM Studio SDK: Local model management and inference optimization
• Redis Vector Store: Efficient storage and retrieval of document embeddings
• Custom Training Pipeline: Automated model fine-tuning and deployment workflow
• API Gateway: Seamless integration between multiple AI models and services

🛠️ Tech Stack

Frontend

• Next.js 15 - React framework with App Router
• TypeScript - Type-safe JavaScript
• Tailwind CSS - Utility-first CSS framework
• Lucide React - Beautiful icons
• Zustand - State management
• React Hot Toast - Notifications

Backend

• Express.js - Web framework for Node.js
• MongoDB - NoSQL database with Mongoose ODM
• Google Generative AI - AI integration
• Redis - Caching and session management
• JWT - Authentication
• Multer - File upload handling
• PDF-Parse - PDF text extraction
• Tesseract.js - OCR for image text extraction

🚀 Getting Started

Prerequisites

• Node.js 18+
• MongoDB database
• Redis server
• Google Generative AI API key

Installation

1. Clone the repository

   git clone https://github.com/govindmehta/pdfHelper.git
   cd pdfHelper

2. Backend Setup

   cd backend
   npm install

   Create a .env file in the backend directory:

   PORT=5000
   MONGODB_URI=mongodb://localhost:27017/pdfhelper
   JWT_SECRET=your-jwt-secret-key
   GOOGLE_API_KEY=your-google-generative-ai-key
   REDIS_URL=redis://localhost:6379

3. Frontend Setup

   cd ../frontend
   npm install

   Create a .env.local file in the frontend directory:

   NEXT_PUBLIC_API_URL=http://localhost:5000

Running the Application

1. Start the backend server

   cd backend
   npm run dev

2. Start the frontend development server

   cd frontend
   npm run dev

3. Access the application

   • Frontend: http://localhost:3000
   • Backend API: http://localhost:5000
   • API Documentation: http://localhost:5000/api-docs

📁 Project Structure

pdfhelper/
├── backend/
│   ├── config/           # Configuration files
│   ├── controllers/      # Route controllers
│   ├── middlewares/      # Custom middleware
│   ├── models/          # Database models
│   ├── routes/          # API routes
│   ├── services/        # Business logic
│   ├── utils/           # Utility functions
│   ├── uploads/         # File uploads
│   └── server.js        # Main server file
├── frontend/
│   ├── src/
│   │   ├── app/         # Next.js app router
│   │   ├── components/  # React components
│   │   └── lib/         # Utility libraries
│   ├── public/          # Static assets
│   └── package.json
└── README.md

🔧 API Endpoints

Authentication

• POST /api/users/register - Register new user
• POST /api/users/login - User login
• GET /api/users/profile - Get user profile

PDF Management

• POST /api/pdfs/upload - Upload PDF file
• GET /api/pdfs - Get user's PDFs
• GET /api/pdfs/:id - Get specific PDF
• DELETE /api/pdfs/:id - Delete PDF

AI Chat

• POST /api/ai/chat - Chat with PDF content
• GET /api/ai/conversation/:pdfId - Get conversation history

Notes

• POST /api/notes - Create note
• GET /api/notes - Get user's notes
• PUT /api/notes/:id - Update note
• DELETE /api/notes/:id - Delete note

🎨 UI Components

• Landing Page: Modern hero section with gradient animations
• Dashboard: Glass morphism design with PDF management
• Chat Interface: Real-time AI conversation with structured responses
• Authentication: Clean login/register forms
• AI Response: Structured content parsing with icons and formatting

🔒 Security Features

• JWT-based authentication
• Input validation and sanitization
• File upload restrictions
• CORS configuration
• Rate limiting (recommended for production)

📱 Responsive Design

• Mobile-first approach
• Breakpoint-specific layouts
• Touch-friendly interactions
• Optimized performance

🚀 Deployment

Backend Deployment

1. Set up MongoDB Atlas or your preferred database
2. Configure Redis instance
3. Set environment variables
4. Deploy to your preferred platform (Heroku, AWS, etc.)

Frontend Deployment

1. Build the application: npm run build
2. Deploy to Vercel, Netlify, or your preferred platform
3. Configure environment variables

🤝 Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the ISC License.

🙏 Acknowledgments

• Google Generative AI for powerful AI capabilities
• The open-source community for amazing tools and libraries
• Contributors who help improve this project

📞 Support

For support, please create an issue in the GitHub repository or contact the maintainers.

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Made with ❤️ by Govind Mehta