Automated Invoice Generation with n8n
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Streamline your billing process by automatically generating professional invoices. This workflow takes order details, creates a unique invoice ID, checks for duplicates, and generates a PDF invoice ready for distribution.
About This Workflow
This n8n workflow is designed to automate the creation and management of customer invoices, significantly reducing manual effort and potential errors. It begins by listening for incoming order data via a webhook. A unique invoice ID is then generated for each new order, ensuring distinct tracking. The workflow intelligently checks a Google Sheet to prevent duplicate invoice IDs from being created. If the ID is unique, it proceeds to gather all necessary order details like customer information, products, and total amount. Finally, it constructs a professional HTML invoice and converts it into a PDF document, making it ready for immediate delivery or archival.
Key Features
- Automated Invoice ID Generation: Ensures unique and trackable invoice identifiers.
- Duplicate Invoice Prevention: Cross-references with Google Sheets to avoid redundant invoices.
- Dynamic HTML Invoice Creation: Generates fully customizable invoices based on order data.
- PDF Invoice Output: Converts HTML invoices into shareable PDF documents.
- Webhook Integration: Seamlessly integrates with your order management or e-commerce platform.
How To Use
- Configure Webhook: Set up the 'Webhook Simulator' node to receive order data from your system. Ensure your external system sends
customer_name,customer_email,products(an array of objects withname,quantity,price), andtotal. - Generate Invoice ID: The 'Generate Invoice ID' node will automatically create a unique
INV-prefixed identifier. - Check for Duplicates: Connect the 'Generate Invoice ID' to the 'Check if ID Already Exists' node, which queries your Google Sheet (ensure 'Invoice ID' is a column header in your sheet).
- Conditional Logic: The 'If Does not Exist' node determines if the generated invoice ID is new. If the
row_numberfrom the Google Sheets node is empty, it proceeds. - Set Invoice Data: The 'Set Fields' node gathers all necessary data, including the generated
order_idand details from the webhook. - Create HTML Invoice: The 'Create Invoice HTML' node uses the collected data to build a professional HTML invoice structure.
- Convert to PDF: The 'HTML to PDF' node (a RapidAPI call) transforms the generated HTML into a PDF document.
- Append to Google Sheet: The final 'Append to Google Sheet' node saves the newly generated
order_idto your 'Invoices' sheet to prevent future duplicates.
Apps Used
Workflow JSON
{
"id": "e88e6ccc-e2cb-46f5-a5da-dc07d0615a20",
"name": "Automated Invoice Generation with n8n",
"nodes": 7,
"category": "Operations",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: e88e6ccc-e2cb...
About the Author
Crypto_Watcher
Web3 Developer
Automated trading bots and blockchain monitoring workflows.
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