Process Scanned Invoices with Google Drive, OCR & OpenAI to Google Sheets — n8n Workflow

High complexity⚡ Trigger19 nodes🏷️ Invoice Processingby Ovadia Rocks

Overview

This template allows you to automatically process scanned invoices from Google Drive, extract key information using AI, and organize the data in Google Sheets with email notifications.

Overview This comprehensive workflow automates the entire invoice processing pipeline by monitoring a Google Drive folder for new invoice uploads, intelligently processing both PDF and image formats, extracting structured data using AI-powered information extraction, and automatically organizing the results in a

Nodes used

Google SheetsHTTP RequestMailgunGoogle DriveHTMLOpenAI Chat ModelInformation Extractor

Workflow Preview

Reroute to OCR if needed
- Try to extract text directly from PDF.
- CamScanner is not saving text in a readable format, s
- Otherwise we send the text di
Setting some handy values for later down the
OCR for images and badly extracted PDFs
Start here
- Use the manual trigger to initialize the Google Drive
- The scheduled trigger will identify new invoices and
End here
model
⚡
W
When clicking 'Execute w…
OpenAI Chat Model
C
Convert to File
S
Switch Mime Type
L
Loop Over Items
S
Set file identity
S
Save base64
R
Re-set base64
⚡
C
Check for new invoices
Download file
Fetch 50 docs
E
Extract from File
I
Identify CamScanner
Analyze Image
E
Edit Fields
Information Extractor
Append row in sheet
Mailgun
Prepare a table
19 nodes22 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 19 nodes, connecting converttofile, extractfromfile, googledrive.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (19)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
MA

Mailgun

mailgun

#3
GO

Google Drive

googleDrive

#4
HT

HTML

html

#5
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#6
IN

Information Extractor

n8n-nodes-langchain.informationExtractor

#7

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded process-scanned-invoices-with-google-drive-ocr-openai-to-google-sheets file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Process Scanned Invoices with Google Drive, OCR & OpenAI to Google Sheets", "nodes": [...], ...}

Integrations

converttofileextractfromfilegoogledrivegoogledrivetriggergooglesheetshtmlhttprequestifinformationextractorlmchatopenaimailgunmanualtriggersetsplitinbatchesswitch

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes19
Complexityhigh
Triggertrigger
CategoryInvoice Processing

Created by

Ovadia Rocks

Ovadia Rocks

@zohar

Tags

converttofileextractfromfilegoogledrivegoogledrivetriggergooglesheetshtmlhttprequestifinformationextractorlmchatopenai
⚡

New to n8n?

n8n is a free, open-source workflow automation tool. Self-host it or use the cloud version.

Get n8n Free →

Related Invoice Processing Workflows

COCOEMEX+5
medium

Automate Custom QuickBooks Invoice PDFs & Email with n8n

Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpoint—the bill—is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

🔗 Webhook·12 nodes