BulkCert

Category: Web Application
Status: Finished / Live
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Introduction

BulkCert is a high-performance web application designed for event organizers, educators, and businesses to generate thousands of personalized, high-quality certificates in minutes. It streamlines the entire pipeline from design mapping to batch document export and automated email delivery.

The Problem

Event coordinators and educators frequently face the chore of creating personalized certificates for hundreds or thousands of participants. Manual tools are slow and error-prone, while standard mail-merge software lacks the visual precision and styling controls needed to place text accurately over custom PDF designs. Additionally, bulk document rendering often suffers from performance bottlenecks, causing servers to crash or timeout when rendering hundreds of files.

The Solution

BulkCert solves these challenges by providing an intuitive web-based visual editor alongside a highly optimized generation pipeline. Users upload their custom PDF templates, visually define dynamic text fields using draggable bounding boxes, and map them to columns in a spreadsheet. The system then processes the data concurrently in the background, rendering and packaging certificates into a single download archive, or distributing them directly via automated bulk email to each participant.

Core Features

  • Visual Field Editor: Drag, resize, and align dynamic fields over your PDF templates in real-time.
  • Intelligent Font Engine: Full support for standard and custom typography with automatic font-shrink capabilities to prevent text overflow.
  • Dynamic Column Mapping: Instantly match spreadsheet columns to dynamic visual fields with built-in validation checks.
  • Concurrent Generation Pipeline: Optimized in-memory font caching and parallel processing to generate hundreds of high-resolution PDFs concurrently.
  • One-Click Batch Export: Automatically package generated PDFs into a structured ZIP archive for easy distribution.
  • Automated Email Delivery: Bulk email personalized certificates directly to participants using mapped spreadsheet emails.
  • Secure and Private Processing: Automatic deletion of uploaded spreadsheets and documents within 24 hours.

Technologies

Next.js React TailwindCSS PDF.js Prisma PostgreSQL Clerk pdf-lib Resend