Invoice Processor & Validator with OCR, AI & Google Sheets

n8n template #4247

Summary

📝 Say goodbye to manual invoice checking! This smart workflow automates your entire invoice processing pipeline using AI, OCR, and Google Sheets. ⚙️ What This Workflow Does: 📥 1. Reads an invoice PDF — Select a local PDF invoice from your machine. 🔍 2. Extracts raw text using OCR — Converts scanned or digital PDFs into readable text. 🧠 3. AI Agent processes the text — Transforms messy raw text into clean JSON using natural language understanding. 🧱 4. Structures and refines the JSON — Converts AI output into a structured, usable format. 🔄 5. Splits item-wise data — Extracts individual invoice line items with all details. 🆔 6. Generates unique keys — Creates a unique identifier for eac

How to set it up

Open template #4247 on n8n.io and click Use for free, or copy the template JSON and paste it onto an empty canvas in n8n.
Create 2 credentials under Credentials → Add credential: Google Sheets, OpenRouter Chat Model. Then open each of those nodes and pick the credential.
Check the model in the AI Agent node. The template may point at a model your account can't use; swap it for one you have access to.
Click Execute workflow and step through each node's output to confirm the data looks right.
Toggle the workflow to Active so its trigger runs on its own.

Hand off to your agent

Prompt

Help me set up the n8n workflow "Invoice Processor & Validator with OCR, AI & Google Sheets" (https://n8n.io/workflows/4247). It uses: Google Sheets, Code, AI Agent, OpenRouter Chat Model. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.

Paste into Claude Code and it will do the rest.

Apps and nodes

Google Sheets Code AI Agent OpenRouter Chat Model

Questions

Yes. Dhrumil Patel published it free on n8n.io as a verified creator, and it has 14K views. It runs on n8n Cloud or a self-hosted n8n instance.

Google Sheets, OpenRouter Chat Model. The other 2 nodes are built into n8n.

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