Automate Invoice Data Extraction with OCR.Space, GPT & Google Sheets — n8n Workflow

Medium complexity⏰ Scheduled10 nodes🏷️ Invoice Processingby Supira Inc.

Overview

Overview This template automates invoice processing for teams that currently copy data from PDFs into spreadsheets by hand. It is ideal for small businesses, back-office teams, accounting, and operations who want to reduce manual entry, avoid human error, and never miss a payment deadline. The workflow watches a structured Google Drive folder, performs OCR, converts the text into clean structured JSON with an LLM, and appends one row per invoice into Google Sheets. It preserves a link back to th

Nodes used

Google SheetsHTTP RequestGoogle DriveCodeOpenAI

Workflow Preview

Schedule Trigger (Recurring Execution)
Purpose
- Periodically scan the Drive folder that stores invoic
- Can also be executed manually for debugging.
Google Drive Folder Discovery
Purpose
- Get the parent folder (e.g., "支払い請求書自動計算用フォルダ" meanin
- Auto-detect the current-month subfolder (e.g., a fold
AI Structured Extraction & Google Sheets Appe
Purpose
- Convert OCR results to a strict JSON structure using
- Extract invoice_date / due_date / client_name / subto
OCR Processing (PDF → Text Cleanup)
Purpose
- Download Drive files as binary.
- Use the OCR.Space API for text extraction.
- Remove noise and normalize line breaks.
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S
Schedule Trigger (Weekly…
Get Parent Folder
Get Monthly Subfolder
List Files
Download File (Binary fr…
OCR (OCR.Space Parsing)
Clean OCR Text (Noise Re…
AI Extraction (Generate …
Parse AI Output to JSON
Append to Google Sheets
10 nodes9 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a scheduled trigger, running on a defined schedule.

  2. 2

    Process

    Data flows through 10 nodes, connecting code, googledrive, googlesheets.

  3. 3

    Output

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

Node Details (10)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
GO

Google Drive

googleDrive

#3
CO

Code

code

#4
OP

OpenAI

n8n-nodes-langchain.openAi

#5

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 automate-invoice-data-extraction-with-ocrspace-gpt-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": "Automate Invoice Data Extraction with OCR.Space, GPT & Google Sheets", "nodes": [...], ...}

Integrations

codegoogledrivegooglesheetshttprequestopenaischeduletrigger

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes10
Complexitymedium
Triggerscheduled
CategoryInvoice Processing

Created by

Supira Inc.

Supira Inc.

@supira

Tags

codegoogledrivegooglesheetshttprequestopenaischeduletrigger
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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