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Workshop certificate generator with Google Drive, Gmail & QR verification

Jitesh DugarJitesh Dugar
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2/3/2026
WebhookValidationEmailAttachment ProcessingPDF
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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": "john@example.com",
  "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

n8n Workshop Certificate Generator with Google Drive, Gmail, & QR Verification

This n8n workflow automates the process of generating and distributing workshop certificates, complete with QR code verification, using data from Google Sheets. It streamlines the post-workshop administrative tasks, ensuring participants receive their certificates efficiently and securely.

What it does

This workflow is designed to handle the following steps:

  1. Triggered by a Webhook: The workflow starts when it receives a webhook, likely containing data for a new certificate generation request.
  2. Prepares Data: An "Edit Fields (Set)" node is used to prepare or transform the incoming data, likely extracting relevant participant information.
  3. Conditional Processing: An "If" node evaluates a condition.
    • If True: It proceeds to generate a QR code, create a certificate in Google Drive, and send it via Gmail.
    • If False: It sends a notification to Slack, indicating that a certificate could not be generated.
  4. Generate QR Code (Conditional True Path): A "Code" node is used to generate a QR code. This QR code is likely embedded with verification information.
  5. Create Certificate in Google Drive (Conditional True Path): A "Google Drive" node creates a new certificate file, possibly from a template, using the participant's data and the generated QR code.
  6. Send Certificate via Gmail (Conditional True Path): A "Gmail" node sends the newly created certificate as an attachment to the participant's email address.
  7. Send Slack Notification (Conditional False Path): A "Slack" node sends a message to a designated Slack channel, informing about the failed certificate generation.
  8. Respond to Webhook: The workflow concludes by responding to the initial webhook, indicating the status of the certificate generation process.
  9. Google Sheets (Unconnected): A "Google Sheets" node is present in the workflow but is not connected to the main flow. This suggests it might be used for initial data input or logging, but its current state is unutilized in the described flow.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running instance of n8n.
  • Google Account: With access to Google Drive and Gmail for certificate generation and email distribution. You will need to configure Google OAuth2 credentials in n8n.
  • Slack Account: To receive notifications about certificate generation failures. You will need to configure Slack credentials in n8n.
  • Google Sheets: (Optional, as it's not connected in the provided JSON) If you intend to use the Google Sheets node for data input or logging, you will need a Google Sheets spreadsheet.

Setup/Usage

  1. Import the Workflow: Import the provided JSON into your n8n instance.
  2. Configure Credentials:
    • Set up your Google OAuth2 credentials for the Google Drive and Gmail nodes.
    • Set up your Slack credentials for the Slack node.
  3. Configure Webhook:
    • Activate the "Webhook" trigger node and copy its URL. This URL will be used to trigger the workflow.
  4. Configure "Edit Fields (Set)": Adjust the fields in the "Edit Fields (Set)" node to correctly map and transform the data received by the webhook for certificate generation.
  5. Configure "If" Node: Define the conditions in the "If" node that determine whether a certificate should be generated or if a Slack notification should be sent.
  6. Configure "Code" Node: Ensure the JavaScript code in the "Code" node is correctly set up to generate the desired QR code content.
  7. Configure "Google Drive" Node:
    • Specify the Google Drive folder where certificates should be created.
    • Point to your certificate template file (if applicable).
    • Map the data to populate the certificate.
  8. Configure "Gmail" Node:
    • Set the recipient email address (likely from the incoming webhook data).
    • Define the email subject and body.
    • Ensure the generated certificate from Google Drive is attached.
  9. Configure "Slack" Node:
    • Specify the Slack channel to send notifications to.
    • Customize the message for failed certificate generations.
  10. Activate the Workflow: Once all configurations are complete, activate the workflow.
  11. Trigger the Workflow: Send a POST request to the Webhook URL with the necessary participant data to initiate the certificate generation process.

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