Overview:

The Invoice Generator is a web-based tool designed to create, manage, and export professional invoices for businesses, freelancers, or service providers. Users can input customer details, list products or services, apply taxes/discounts, and instantly generate downloadable invoice PDFs.

This project helps users streamline billing and offers a real-world use case for learning backend logic, form handling, and dynamic document generation.

Technologies Used:

• Frontend: HTML, CSS, Bootstrap, JavaScript

• Backend: PHP / Java (Spring Boot) / Node.js (Express.js)

• Database: MySQL / MongoDB (optional)

• Libraries/Plugins: jsPDF / html2pdf (for generating PDF invoices)

???? User Roles:

• Admin/User: Creates and manages invoices, saves customer info, exports records

Key Features:

1. Invoice Form Builder:

• Enter company & client details (name, address, contact, GST number, etc.)

• Add multiple line items: product/service name, quantity, unit price

• Auto-calculate subtotal, tax, discount, and grand total

2. Real-time Calculations:

• JavaScript-powered dynamic calculation of totals as items are added/edited

• Tax selection dropdowns (GST, VAT, custom %)

3. PDF Generation:

• Generate a clean, printable invoice in PDF format

• Include company logo, signature, and branding

• Download or print directly from the browser

4. Invoice History & Storage:

• (Optional) Save generated invoices in database with timestamp and unique ID

• View/download previous invoices from dashboard

5. Invoice Numbering:

• Auto-generate unique invoice numbers based on user/company name and date

• Format: INV/2025/0001, etc.

6. Authentication (Optional):

• Secure login for users

• Role-based access for multi-user (if extended)

7. Currency & Tax Configuration:

• Set preferred currency (₹, $, €, etc.)

• Enable/disable tax fields as per region or preference