Smart Email Writer – AI Chrome Extension

Smart Email Writer is an AI-powered Chrome extension that integrates directly with Gmail to generate professional email replies.
It uses a Spring Boot backend connected to the Gemini API to analyze email context and automatically generate high-quality responses, helping users draft replies faster and improve productivity.

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🚀 Features

• ✉️ AI Email Reply Generation

  • Automatically generates professional responses based on email context.

• ⚡ One-Click AI Reply

  • Injects a custom “AI Reply” button directly inside the Gmail interface.

• 🧠 Context-Aware Responses

  • Uses Gemini API to understand the email content before generating replies.

• 🔌 Chrome Extension Integration

  • Seamlessly works within Gmail without leaving the browser.

• ⚙️ Backend API Processing

  • Spring Boot backend handles request processing and communication with Gemini AI.

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🏗️ System Architecture

Gmail UI
   │
   ▼
Chrome Extension (JS, HTML, CSS)
   │
   ▼
Spring Boot Backend API
   │
   ▼
Gemini AI API
   │
   ▼
Generated Email Reply

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🛠️ Tech Stack

Frontend (Extension)

• JavaScript
• HTML
• CSS
• Chrome Extension APIs

Backend

• Spring Boot
• REST APIs
• JSON Processing

AI Integration

• Gemini API (Google AI)

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📂 Project Structure

smart-email-writer
│
├── chrome-extension
│   ├── manifest.json
│   ├── content.js
│   ├── popup.html
│   ├── popup.js
│   └── styles.css
│
├── backend
│   ├── controller
│   ├── service
│   ├── dto
│   └── config
│
└── README.md

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⚙️ Installation & Setup

1️⃣ Clone the Repository

git clone https://github.com/your-username/smart-email-writer.git
cd smart-email-writer

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2️⃣ Backend Setup (Spring Boot)

1. Navigate to backend folder

cd backend

2. Add your Gemini API Key in application.properties

gemini.api.key=YOUR_API_KEY

3. Run the Spring Boot application

mvn spring-boot:run

Backend runs on:

http://localhost:8080

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3️⃣ Chrome Extension Setup

1. Open Chrome
2. Go to

chrome://extensions

3. Enable Developer Mode
4. Click Load Unpacked
5. Select the chrome-extension folder

The extension will now appear in Chrome.

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📖 Usage

1. Open Gmail
2. Open any email conversation
3. Click the AI Reply button
4. The extension sends the email content to the backend
5. Backend requests Gemini API
6. AI-generated reply appears instantly

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💡 Example Workflow

User opens Gmail
       ↓
Clicks "AI Reply"
       ↓
Extension extracts email content
       ↓
Backend processes request
       ↓
Gemini generates response
       ↓
Reply inserted into Gmail draft

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🔮 Future Improvements

• Tone selection (Professional / Friendly / Formal)
• Multi-language email generation
• Email summarization
• Custom response templates
• Support for Outlook and other email platforms

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👨‍💻 Author

Mohit Kumar

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