Extract data from Invoice with OCR

Say goodbye to manual data entry.

This automation extracts structured accounting data directly from supplier invoices using OCR and AI.

When a user uploads a PDF invoice, the system:

- Reads both the text and image layers of the invoice.

- Automatically identifies and maps common accounting fields (invoice number, vendor info, tax code, etc.).

- Detects multilingual invoices (English, Vietnamese, etc.) and applies intelligent field mapping.

- Exports the extracted data as structured JSON and stores it in your Diaflow Table for reporting or ERP syncing.

This saves hours of manual work for accountants, auditors, and finance teams.

⚙️ How It Works

1️⃣ Upload Trigger (Form Input)

User uploads a PDF invoice through the workflow form.

2️⃣ OCR Extraction (Document-to-Text Node)

Converts the PDF content into machine-readable text while preserving layout and structure.

3️⃣ PDF-to-Image Conversion

Splits the PDF into page images for visual reference and enhanced AI accuracy.

4️⃣ AI Extraction (GPT-4o-mini)

Combines OCR text and image context to extract structured accounting fields: invoice numbers, dates, tax IDs, vendor/buyer details, and itemized line data.

5️⃣ Field Mapping & Normalization

Detects language and applies rule-based field mappings (e.g., “Tax Code” = “Mã số thuế”). Formats all dates and currencies to ISO standards.

6️⃣ Data Storage (Diaflow Tables)

Automatically saves the JSON output into a designated table for review or synchronization with accounting systems.

7️⃣ Output Confirmation

Displays a success message and the extracted table entry.

🚀 Key Benefits

- Automated Invoice Processing – Eliminate manual typing and reduce errors.

- AI-Powered Accuracy – Combines OCR and GPT for multilingual, structured data extraction.

- Ready-to-Use Data – Instantly stored in Diaflow Tables for analysis, export, or ERP sync.

🧩 Workflow Summary

1️⃣ File Upload Trigger (PDF)

2️⃣ OCR Text Extraction

3️⃣ PDF-to-Image Conversion

4️⃣ AI-Based Data Extraction (GPT-4o-mini)

5️⃣ Field Mapping & Standardization

6️⃣ Save Structured Data to Diaflow Tables

7️⃣ Output Confirmation

🎯 Perfect For

- Accounting teams processing supplier invoices

- Auditors and finance analysts needing accurate structured data

- Businesses managing high invoice volumes

- Automation consultants building AI-powered data pipelines