This workflow follows the Gmail → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "11 - Form \u2192 PDF Generator \u2192 Email",
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "generate-pdf",
"responseMode": "responseNode",
"options": {}
},
"id": "node-webhook",
"name": "Webhook - Form Submission",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
260,
300
]
},
{
"parameters": {
"jsCode": "const body = $input.first().json.body || $input.first().json;\n\n// Template type determines which PDF layout to generate\nconst templateType = body.template || 'invoice';\n\n// Build HTML based on template type\nlet htmlContent = '';\nconst now = new Date();\nconst dateStr = now.toLocaleDateString('en-US', { year: 'numeric', month: 'long', day: 'numeric' });\n\nif (templateType === 'invoice') {\n const items = body.items || [{ description: 'Service', quantity: 1, price: 100 }];\n const subtotal = items.reduce((s, i) => s + (i.quantity * i.price), 0);\n const tax = subtotal * (body.taxRate || 0.1);\n const total = subtotal + tax;\n\n const itemRows = items.map(item =>\n `<tr>\n <td style=\"padding:10px; border-bottom:1px solid #e5e7eb;\">${item.description}</td>\n <td style=\"padding:10px; border-bottom:1px solid #e5e7eb; text-align:center;\">${item.quantity}</td>\n <td style=\"padding:10px; border-bottom:1px solid #e5e7eb; text-align:right;\">$${parseFloat(item.price).toFixed(2)}</td>\n <td style=\"padding:10px; border-bottom:1px solid #e5e7eb; text-align:right;\">$${(item.quantity * item.price).toFixed(2)}</td>\n </tr>`\n ).join('');\n\n htmlContent = `<!DOCTYPE html><html><head><meta charset=\"UTF-8\"><title>Invoice ${body.invoiceNumber || 'INV-001'}</title></head>\n<body style=\"font-family: Arial, sans-serif; margin: 40px; color: #333;\">\n <div style=\"display:flex; justify-content:space-between; align-items:start; margin-bottom:40px;\">\n <div>\n <h1 style=\"color:#4f46e5; margin:0;\">INVOICE</h1>\n <p style=\"color:#6b7280; margin:4px 0;\">Invoice #: ${body.invoiceNumber || 'INV-001'}</p>\n <p style=\"color:#6b7280; margin:4px 0;\">Date: ${dateStr}</p>\n <p style=\"color:#6b7280; margin:4px 0;\">Due: ${body.dueDate || 'Net 30'}</p>\n </div>\n <div style=\"text-align:right;\">\n <h2 style=\"margin:0; color:#1a1a2e;\">${body.companyName || 'Your Company'}</h2>\n <p style=\"margin:4px 0; color:#6b7280;\">${body.companyAddress || ''}</p>\n <p style=\"margin:4px 0; color:#6b7280;\">${body.companyEmail || ''}</p>\n </div>\n </div>\n <div style=\"background:#f9fafb; padding:16px; border-radius:8px; margin-bottom:24px;\">\n <h3 style=\"margin:0 0 8px;\">Bill To:</h3>\n <p style=\"margin:2px 0;\">${body.clientName || ''}</p>\n <p style=\"margin:2px 0;\">${body.clientAddress || ''}</p>\n <p style=\"margin:2px 0;\">${body.clientEmail || ''}</p>\n </div>\n <table style=\"width:100%; border-collapse:collapse;\">\n <thead><tr style=\"background:#4f46e5; color:white;\">\n <th style=\"padding:10px; text-align:left;\">Description</th>\n <th style=\"padding:10px; text-align:center;\">Qty</th>\n <th style=\"padding:10px; text-align:right;\">Rate</th>\n <th style=\"padding:10px; text-align:right;\">Amount</th>\n </tr></thead>\n <tbody>${itemRows}</tbody>\n </table>\n <div style=\"text-align:right; margin-top:16px;\">\n <p>Subtotal: <strong>$${subtotal.toFixed(2)}</strong></p>\n <p>Tax (${((body.taxRate || 0.1)*100).toFixed(0)}%): <strong>$${tax.toFixed(2)}</strong></p>\n <p style=\"font-size:1.5em; color:#4f46e5;\">Total: <strong>$${total.toFixed(2)}</strong></p>\n </div>\n ${body.notes ? `<div style=\"margin-top:24px; padding:16px; background:#fffbeb; border-radius:8px;\"><strong>Notes:</strong><br>${body.notes}</div>` : ''}\n</body></html>`;\n\n return [{ json: { htmlContent, templateType, recipientEmail: body.clientEmail || body.email, recipientName: body.clientName || 'Client', subject: `Invoice ${body.invoiceNumber || 'INV-001'} from ${body.companyName || 'Us'}`, filename: `Invoice-${body.invoiceNumber || 'INV-001'}.pdf` } }];\n}\n\n// Default: simple report template\nhtmlContent = `<!DOCTYPE html><html><body style=\"font-family:Arial,sans-serif; margin:40px;\">\n<h1>${body.title || 'Report'}</h1><p>Generated: ${dateStr}</p>\n<div>${body.content || 'No content provided.'}</div>\n</body></html>`;\n\nreturn [{ json: { htmlContent, templateType, recipientEmail: body.email, recipientName: body.name || 'Recipient', subject: body.emailSubject || 'Your PDF is ready', filename: 'document.pdf' } }];"
},
"id": "node-build-html",
"name": "Code - Build PDF HTML",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
480,
300
]
},
{
"parameters": {
"method": "POST",
"url": "https://api.pdfmonkey.io/api/v1/documents",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer {{ $env['PDFMONKEY_API_KEY'] }}"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"document\": {\n \"document_template_id\": \"{{ $env['PDFMONKEY_TEMPLATE_ID'] || 'html' }}\",\n \"status\": \"pending\",\n \"payload\": {\n \"html\": {{ JSON.stringify($json.htmlContent) }}\n },\n \"meta\": {\n \"filename\": {{ JSON.stringify($json.filename) }}\n }\n }\n}",
"options": {}
},
"id": "node-pdf-create",
"name": "HTTP - PDFMonkey Create Document",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
700,
300
]
},
{
"parameters": {
"amount": 5,
"unit": "seconds"
},
"id": "node-wait",
"name": "Wait - PDF Generation",
"type": "n8n-nodes-base.wait",
"typeVersion": 1.1,
"position": [
920,
300
]
},
{
"parameters": {
"method": "GET",
"url": "https://api.pdfmonkey.io/api/v1/documents/{{ $('HTTP - PDFMonkey Create Document').item.json.document.id }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer {{ $env['PDFMONKEY_API_KEY'] }}"
}
]
},
"options": {}
},
"id": "node-pdf-poll",
"name": "HTTP - PDFMonkey Get Status",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1140,
300
]
},
{
"parameters": {
"method": "GET",
"url": "={{ $json.document.download_url }}",
"options": {
"response": {
"response": {
"responseFormat": "file"
}
}
}
},
"id": "node-download-pdf",
"name": "HTTP - Download PDF Binary",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1360,
300
]
},
{
"parameters": {
"sendTo": "={{ $('Code - Build PDF HTML').item.json.recipientEmail }}",
"subject": "={{ $('Code - Build PDF HTML').item.json.subject }}",
"message": "<p>Dear {{ $('Code - Build PDF HTML').item.json.recipientName }},</p>\n<p>Please find your document attached.</p>\n<p>If you have any questions, please don't hesitate to reach out.</p>\n<p>Best regards,<br>The Team</p>",
"options": {
"attachmentsUi": {
"attachmentsBinary": [
{
"property": "data",
"filename": "={{ $('Code - Build PDF HTML').item.json.filename }}"
}
]
}
}
},
"id": "node-gmail-send",
"name": "Gmail - Send PDF Email",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
1580,
300
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={ \"success\": true, \"message\": \"PDF generated and emailed to {{ $('Code - Build PDF HTML').item.json.recipientEmail }}\" }"
},
"id": "node-respond",
"name": "Respond to Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
1580,
460
]
}
],
"connections": {
"Webhook - Form Submission": {
"main": [
[
{
"node": "Code - Build PDF HTML",
"type": "main",
"index": 0
}
]
]
},
"Code - Build PDF HTML": {
"main": [
[
{
"node": "HTTP - PDFMonkey Create Document",
"type": "main",
"index": 0
}
]
]
},
"HTTP - PDFMonkey Create Document": {
"main": [
[
{
"node": "Wait - PDF Generation",
"type": "main",
"index": 0
}
]
]
},
"Wait - PDF Generation": {
"main": [
[
{
"node": "HTTP - PDFMonkey Get Status",
"type": "main",
"index": 0
}
]
]
},
"HTTP - PDFMonkey Get Status": {
"main": [
[
{
"node": "HTTP - Download PDF Binary",
"type": "main",
"index": 0
}
]
]
},
"HTTP - Download PDF Binary": {
"main": [
[
{
"node": "Gmail - Send PDF Email",
"type": "main",
"index": 0
},
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"tags": [
{
"name": "pdf"
},
{
"name": "documents"
},
{
"name": "automation"
}
],
"meta": {
"description": "Form submission triggers HTML invoice/report generation in Code node, submits to PDFMonkey API, polls for completion, downloads binary PDF, then emails it as an attachment via Gmail.",
"alternatives": "Replace PDFMonkey with: html-pdf-node (self-hosted), Puppeteer via n8n Execute Command, or DocRaptor API",
"prerequisites": [
"PDFMonkey account and API key (or alternative PDF API)",
"Gmail OAuth2 credentials",
"Set env variables: PDFMONKEY_API_KEY, PDFMONKEY_TEMPLATE_ID (optional)",
"Adjust Wait node to 10-15 seconds for complex PDFs"
],
"testingScenario": {
"test_payload": {
"template": "invoice",
"invoiceNumber": "INV-2026-001",
"companyName": "The AI Stack",
"companyEmail": "billing@theaistack.com",
"clientName": "Acme Corp",
"clientEmail": "accounts@acme.com",
"dueDate": "Net 30",
"taxRate": 0.1,
"items": [
{
"description": "AI Automation Consulting",
"quantity": 10,
"price": 250
},
{
"description": "n8n Workflow Setup",
"quantity": 5,
"price": 150
}
],
"notes": "Thank you for your business!"
}
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
gmailOAuth2
Pro
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About this workflow
11 - Form → PDF Generator → Email. Uses httpRequest, gmail. Webhook trigger; 8 nodes.
Source: https://github.com/satmakuru222/TheAIStackk/blob/main/n8n-workflows/11-form-pdf-generator-email.json — original creator credit. Request a take-down →
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