PDF Invoice Data Extraction to MongoDB – Node.js & React with OpenAI

A full-stack application for extracting structured data from invoices using OpenAI’s GPT models. Built with Node.js backend and React frontend, featuring multi-language support and automated database storage.

DISCLAIMER:- This item uses third-party AI services (such as OpenAI) which are not included in the purchase price. Buyers are responsible for providing their own API keys and covering any usage costs charged by these services. No AI credits, subscriptions, or usage fees are included with this item.

Features

• AI-Powered Extraction: Uses OpenAI GPT-4o-mini for accurate invoice data extraction with structured JSON output
• Multi-Format Support: Processes text, PDF (using pdf-parse), and image files (using Tesseract.js OCR)
• Database Automation: Automatically stores extracted data in MongoDB with Mongoose ODM
• Multi-Language Support: Built-in internationalization with English and Spanish translations
• RESTful API: Clean API endpoints for invoice management with proper error handling
• Data Validation: Comprehensive validation service with fallbacks and data cleaning
• File Upload: Multi-file upload support (up to 5 files) with drag-and-drop interface
• Export Functionality: Export extracted data to Excel format
• Unit Testing: Comprehensive test coverage with Jest and Supertest
• Modern UI: React-based frontend with responsive design and Tailwind CSS
• Text Preprocessing: Intelligent text preprocessing to handle OCR artifacts and formatting issues