🧠 DocMind — Local AI Document Chatbot

100% offline · No API keys · Privacy-first

DocMind lets you chat with your documents (PDF, DOCX, TXT) using a local AI model. Everything runs on your machine — no cloud, no data leaving your computer.

✨ Features

• ✅ 100% Local — No API keys, no internet required after setup
• ✅ Multi-format — Upload PDF, DOCX, or TXT files
• ✅ Smart RAG — Retrieves relevant chunks from your documents
• ✅ Conversation Memory — Remembers last 5 exchanges
• ✅ Source Citations — See exactly where answers come from
• ✅ Streaming Response — Typewriter effect for natural feel
• ✅ Persistent Storage — Documents stay indexed across sessions

🏗️ Architecture

┌─────────────┐ ┌──────────────┐ ┌─────────────────┐ │ Streamlit │────▶│ Chroma DB │◀────│ Documents │ │ UI │ │ (Vectors) │ │ (PDF/DOCX/TXT) │ └─────────────┘ └──────────────┘ └─────────────────┘ │ │ │ ▼ ▼ ▼ ┌─────────────┐ ┌──────────────┐ ┌─────────────────┐ │ FLAN-T5 │◀────│ Sentence- │────▶│ Chunking & │ │ (LLM) │ │ Transformers │ │ Embedding │ └─────────────┘ └──────────────┘ └─────────────────┘

📋 Requirements

• Python 3.9+
• 8GB RAM (4GB minimum, slower)
• 3GB free disk space (for models)

🚀 Quick Start

1. Clone the repository

git clone https://github.com/muneebulrehman14/DocMind-Local-Chatbot.git
cd DocMind-Local-Chatbot
**2. Create virtual environment**
python -m venv venv
source venv/bin/activate      # Linux/Mac
# venv\Scripts\activate       # Windows

** 3. Install dependencies**
pip install -r requirements.txt

**Run the app
streamlit run app.py**


**🎮 Usage Guide**
Upload Documents

    Click sidebar expander

    Drag & drop PDF/DOCX/TXT files

    Wait for "✅ Indexed" message

Ask Questions

    Type in chat input at bottom

    Bot searches relevant chunks

    Answer appears with source citations

Manage Sessions

    Clear Chat — Removes conversation history

    Reset All — Deletes all documents and starts fresh