Generate & deliver certificates with VerifiEmail & HTMLcsstoImg to Gmail

Automated Certificate Generator with Email Validation & Delivery Automatically generate, validate, and deliver professional course completion certificates with zero manual work — from webhook request to PDF delivery in seconds. --- Overview This workflow transforms certificate generation from a manual design task into a fully automated system. It receives certificate requests via webhook, validates recipient emails using advanced verification, generates beautifully designed HTML certificates, converts them to high-quality PNG images, delivers via professional email templates, and maintains complete audit trails in Google Sheets. Powered by email validation APIs and HTML-to-image conversion, it ensures every certificate meets professional standards while preventing delivery to invalid or fraudulent email addresses. --- What This Workflow Does - Receives certificate requests via webhook from your LMS, CRM, or custom application - Validates recipient emails using VerifiEmail API with comprehensive checks: - RFC compliance verification - MX record validation - Disposable email detection - Spoof and fraud prevention - Generates professional certificates with custom HTML/CSS templates featuring: - Purple gradient backgrounds with modern typography - Google Fonts integration (Playfair Display + Montserrat) - Gold achievement badges - Auto-generated unique certificate IDs - Formatted completion dates - Instructor signatures - Converts HTML to PNG using HTMLcsstoImg API for permanent, shareable images - Delivers via email with branded HTML templates including download links and LinkedIn sharing CTAs - Logs everything to Google Sheets for reporting, analytics, and certificate verification - Handles errors with automatic validation checks and optional Slack notifications --- Key Features - Zero Manual Work: Fully automated from request to delivery - Advanced Email Validation: Blocks invalid, temporary, and fraudulent email addresses - Professional Design: Print-ready certificates with customizable branding - Unique Certificate IDs: Auto-generated format: CERT-{timestamp}-{random} - Instant Delivery: Certificates sent within seconds of completion - Complete Audit Trail: All certificates logged with 10+ data points - Error Prevention: Validation stops invalid requests before processing - Highly Customizable: Easy to modify colors, fonts, layouts, and email templates - Scalable: Handles hundreds of certificates per day - API-Ready: RESTful webhook endpoint for easy integration --- Use Cases Educational Institutions - Automatically issue certificates for online courses and programs - Generate graduation certificates for completed degrees - Create participation certificates for workshops and seminars Corporate Training - Award compliance training certificates to employees - Recognize professional development completions - Issue skill certification for internal programs Online Course Platforms - Integrate with LMS systems (Teachable, Thinkific, Kajabi) - Automate certificate delivery upon course completion - Build certificate libraries for student portfolios Event Management - Issue attendance certificates for conferences and webinars - Generate speaker appreciation certificates - Create volunteer recognition certificates Certification Programs - Award professional certifications and credentials - Generate CPE/CE certificates for continuing education - Issue examination completion certificates --- Prerequisites Required Services & Accounts - n8n (self-hosted or cloud) - Workflow automation platform - VerifiEmail Account - Email validation API - HTMLcsstoImg Account - HTML to PNG conversion - Gmail Account - Email delivery via OAuth2 - Google Workspace - For Sheets logging and tracking Required Credentials 1. VerifiEmail API Key 2. HTMLcsstoImg User ID + API Key 3. Gmail OAuth2 credentials 4. Google Sheets OAuth2 credentials --- Setup Instructions 1. Import the Workflow 1. Download the certificate-generator.json file 2. In n8n, navigate to Work