How to Automate PDF Invoice Data Extraction with Mistral OCR (n8n Tutorial)
In this step-by-step tutorial, learn how to automate your invoice processing workflow using n8n, Mistral OCR, and OpenAI. This video shows you how to extract key data from PDF invoices — such as invoice number, total amount, and due date — and send it straight to Google Sheets or your CRM automatically.
We’ll focus on building the bottom part of the automation: watching for new files in Google Drive, extracting text using Mistral OCR, parsing it with GPT-4, and mapping structured fields into your spreadsheet or CRM.
Whether you're a small business owner, bookkeeper, or automation enthusiast, this workflow will save you hours of manual data entry.
🔍 What You’ll Learn in This Video:
✅ How to use Mistral OCR to extract clean, readable data from PDF invoices
✅ How to dynamically watch for new invoices in Google Drive
✅ How to work with Mistral OCR’s three-step API process (upload, get file URL, extract text)
✅ How to transform messy OCR output into clean, structured fields using OpenAI’s GPT model
✅ How to push the structured data into Google Sheets or any other platform
✅ A quick tip for handling invoices received as images instead of PDFs
✅ Best practices for managing API keys and credentials in n8n
✅ Bonus tricks for reusing HTTP requests and working with curl-based API documentation.
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📁 Free Workflow Template
Download the full n8n workflow (both email-to-Drive and Drive-to-Google Sheet) – https://rightlink.gumroad.com/l/Invoice
🛠 Tools Used:
n8n (open-source automation tool)
Mistral.ai OCR - https://mistral.ai/news/mistral-ocr
OpenAI GPT-4 model
Google Drive & Google Sheets
Why Watch?
If this is your first time here—hi, I'm Aftab! I've spent over 10 years helping small to Large businesses streamline processes and boost efficiency using automation. 
Today, everyone talks about automation and AI, but very few share real-world experiences on how these systems genuinely save time, reduce costs, and improve business results.
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Chapters:
00:00 Introduction to PDF Invoice Automation
00:15 Overview of Mistral.ai OCR
00:36 Mistral.ai OCR Features and Benchmarking
01:17 Pricing Plans for Mistral.ai OCR
01:39 System Overview and Workflow
02:27 Setting Up Google Drive for Automation
03:06 Building the Automation: Google Drive Integration
04:35 Building the Automation: Mistral.ai API Integration
10:06 Extracting Invoice Data with OpenAI
12:49 Final Steps: Mapping Data to Google Sheets
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