Workshop certificate generator with Google Drive, Gmail & QR verification

Automated Pre-Issued Workshop Certificate Generator

Description:

This workflow automates the entire pre-issuance process of workshop participation certificates. When an attendee submits a registration form via a webhook, the workflow validates the data, verifies the attendee’s email, generates a unique Certificate ID and QR code, creates a styled certificate image, stores it on Google Drive, emails the certificate to the attendee, logs all details in Google Sheets, and notifies organizers via Slack — all fully automated.

This template is ideal for institutions, event teams, training organizations, hackathons, and workshops that want to automate certificate issuing and remove manual processing.

Key Features:

• Webhook-based registration intake
• Required field + email validation using VerifiEmail API
• Auto-generated Certificate ID, QR code, and verification URL
• Dynamic HTML-to-Image certificate generation
• Automatic email delivery with certificate attachment (Gmail)
• Auto-upload certificate to Google Drive
• Real-time Slack notification for organizers
• Registration + certificate logging in Google Sheets
• Instant webhook response with certificate metadata

How It Works (Short Summary):

1. Webhook Trigger receives registration details.
2. Validator checks for mandatory fields (name, email, event).
3. Email verification ensures the email is deliverable.
4. Certificate generation creates unique ID + QR + HTML.
5. HTML-to-Image converts the certificate to PNG.
6. Upload to Google Drive stores the certificate file.
7. Email node sends the certificate to the attendee.
8. Google Sheets logs the registration + certificate details.
9. Slack message notifies organizers instantly.
10. Webhook response returns success JSON.

Use Cases:

• Workshops
• Webinars
• Training sessions
• Bootcamps
• Corporate events
• Hackathons
• Student registrations
• Event ticketing / entry pass systems

Required Credentials:

• VerifiEmail API – email validation at verifi.email
• HTMLCSStoImage API – convert certificate HTML to PNG at htmlcsstoimg.com
• Gmail OAuth2 – send certificate emails
• Google Drive OAuth2 – store certificate files
• Google Sheets OAuth2 – logging
• Slack API – organizer notifications

Setup Instructions:

1. Import this template into your n8n instance.

2. Open the Webhook node and copy the generated webhook URL.

3. Use this URL in your registration form / frontend / Postman.

4. Add all required credentials in the Credentials Manager.

5. Customize certificate HTML (colors, branding, logos) if needed.

6. Test with a sample POST request containing all required fields:

   • name
   • email
   • event
   • date
   • time
   • venue
   • organization
   • designation

7. Enable the workflow.

Input Format (POST Body Required):

{
  "name": "John Doe",
  "email": "[email protected]",
  "event": "AI Workshop 2025",
  "date": "25 Nov 2025",
  "time": "10:00 AM",
  "venue": "Auditorium Hall",
  "organization": "Tech University",
  "designation": "Student"
}

Output (Webhook Response):

{
  "success": true,
  "message": "Registration successful! Certificate sent to your email.",
  "certificateId": "CERT-12345-ABCD",
  "verifyUrl": "https://workshopverify.com/cert?id=CERT-12345-ABCD"
}

Why This Workflow is Useful:

• Eliminates manual certificate design & sending
• Ensures professional, consistent certificates
• Reduces event staff workload
• Guarantees accurate data logging
• Provides instant attendee confirmation
• Enhances event experience with automation