AI Invoice Generator

A full-stack invoice management app built on the MERN stack, with Google Gemini AI woven in to speed up the boring parts of invoicing — parsing raw text into a ready-to-edit invoice, writing payment reminder emails, and generating quick financial insights for your dashboard.

Features

• Create, edit, and manage invoices — clients, itemized line items, tax, due dates, and payment terms
• Create Invoice with AI — paste any text (an email, a note, a quote) and let Gemini extract client details and line items automatically
• AI-generated payment reminders — one click to draft a polite, professional reminder email for an overdue invoice
• AI dashboard insights — short, actionable summaries of your revenue, outstanding payments, and invoice activity
• Status tracking — mark invoices Paid / Unpaid, filter and search by client or invoice number
• Print / Export to PDF — clean, print-ready invoice layout
• Authentication — JWT-based login and signup, protected routes
• Dockerized — backend and frontend each run in their own container via Docker Compose for local development

Tech Stack

Frontend

• React (Vite)
• Tailwind CSS
• React Router
• Axios
• Lucide Icons

Backend

• Node.js + Express
• MongoDB + Mongoose
• JWT Authentication
• Google Gemini API (@google/genai)

DevOps

• Docker & Docker Compose (local development)
• Render (backend hosting)
• Vercel (frontend hosting)

Project Structure

Aiinvoicegenerator/
├── docker-compose.yml
├── Backend/
│   ├── Dockerfile
│   ├── server.js
│   ├── controllers/
│   ├── models/
│   ├── routes/
│   └── .env
└── Frontend/
    ├── Dockerfile
    ├── src/
    │   ├── pages/
    │   ├── components/
    │   ├── context/
    │   └── utils/
    └── package.json

Getting Started

Prerequisites

• Node.js (v20+)
• MongoDB (local or Atlas)
• A Google Gemini API key
• Docker (optional, for containerized setup)

1. Clone the repo

git clone https://github.com/patelscripts/AI_Invoice_Generator.git
cd AI_Invoice_Generator

2. Backend setup

cd Backend
npm install

Create a .env file in Backend/:

PORT=8000
MONGO_URI=your_mongodb_connection_string
JWT_SECRET=your_jwt_secret
GEMINI_API_KEY=your_gemini_api_key

Run it:

npm start

3. Frontend setup

cd Frontend
npm install

Create a .env file in Frontend/ (optional, for pointing at a deployed backend):

VITE_API_BASE_URL=http://localhost:8000

Run it:

npm run dev

The app will be running at http://localhost:5173, talking to the backend at http://localhost:8000.

4. Or run everything with Docker Compose

From the project root:

docker-compose up --build

This builds and starts both the backend (:8000) and frontend (:5173) containers.

API Overview

Method	Endpoint	Description
POST	/api/auth/register	Create a new account
POST	/api/auth/login	Log in and receive a JWT
GET	/api/auth/me	Get the logged-in user's profile
PUT	/api/auth/me	Update profile
GET	/api/invoices	Get all invoices for the logged-in user
POST	/api/invoices	Create a new invoice
GET	/api/invoices/:id	Get a single invoice
PUT	/api/invoices/:id	Update an invoice
DELETE	/api/invoices/:id	Delete an invoice
POST	/api/ai/parse-text	Extract invoice data from free-form text
POST	/api/ai/generate-reminder	Generate a reminder email for an invoice
GET	/api/ai/dashboard-summary	Get AI-generated financial insights

Deployment

• Backend is deployed on Render as a Docker web service (Root Directory: Backend, Dockerfile Path: ./Dockerfile)
• Frontend is deployed on Vercel (Root Directory: Frontend), with VITE_API_BASE_URL pointed at the Render backend URL

Roadmap / Ideas

• Recurring invoices
• Multi-currency support
• Email delivery of invoices/reminders directly from the app
• Client-facing payment links

Author

Navneet Patel GitHub: @patelscripts