Generate PDF Invoices & Email via Gmail with pdfmill Workflow

Generate a PDF invoice and automatically email it via Gmail with the pdfmill workflow

Turn structured invoice data into a polished PDF invoice using pdfmill, then deliver it instantly to your customer by sending an email with the PDF attached through Gmail—all inside an n8n automation workflow.

What this workflow does

• Manual trigger: Starts when you manually execute the workflow.
• Create invoice data: Builds a sample invoice payload including billing details, line items, totals, and the recipient email.
• Generate PDF with pdfmill: Uses the pdfmill node (pdf template selected during setup) to generate an invoice PDF from the invoice data.
• Email the invoice via Gmail: Sends the generated PDF to the customer using the Gmail node, attaching the output from the PDF generation step.

Use cases

• SaaS billing operators who need a quick way to produce and email invoices from a JSON invoice payload.
• n8n users testing invoice automation before wiring it to a source like Stripe data or a webhook.
• Automation engineers who want a clear template for mapping invoice fields into pdfmill and delivering the PDF through Gmail.

Technical details

• n8n nodes / integrations: set, gmail, manual trigger, and n8n-nodes-generate-pdfgenerate (pdfmill PDF generation).
• Setup requirements: Add a pdfmill credential and select the invoice template in the PDF generation step.
• Email credentials: Add a Gmail OAuth credential (or replace the email step with SMTP) and ensure the sender account has permission to send email attachments.
• Data mapping: Replace the sample invoice JSON with your real invoice data and verify the recipient email field used for sending.