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Generate structured exams from PDFs with OpenAI GPT-4o and HTML to PDF

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Created by: Ramdoni || ramdoni
Ramdoni

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Last update 2 months ago

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🚀 ExamForge AI

Automated PDF to Structured Exam Generator (MCQ + Essay + Answer Key)

Generate structured exams automatically from text-based PDF materials using AI.

ExamForge AI is a production-ready n8n workflow that transforms educational content into multiple-choice and essay questions with customizable difficulty and automatic answer key generation.

✨ Features

  • 📄 Upload PDF via Webhook
  • ✅ File size validation (default: max 5MB)
  • 🧹 Automatic text cleaning
  • 📏 Token length estimation & safety control
  • 🎯 Customizable MCQ & Essay count
  • 🧠 Difficulty selection (easy / medium / hard)
  • 🌍 Language selection
  • 📦 Structured JSON AI output
  • 📝 Separate Exam PDF & Answer Key PDF
  • 📲 Telegram delivery support (optional)
  • 🔒 Parameter validation with structured error responses

🧠 What This Workflow Does

  1. Accepts PDF upload via Webhook
  2. Validates file size
  3. Extracts and cleans text content
  4. Estimates text length to prevent token overflow
  5. Validates required parameters:
    • mcq_count
    • essay_count
    • difficulty
    • language
  6. Sends structured prompt to OpenAI
  7. Parses JSON response
  8. Formats exam and answer key separately
  9. Converts both into PDF
  10. Sends results via Telegram or Webhook response

⚙️ Requirements

Accounts Required

  • OpenAI account (API key required)
  • Telegram Bot (optional)
  • PDF Munk (API key required)

Environment

  • n8n (self-hosted or cloud)
  • Node version compatible with your n8n installation

🔑 Credentials Setup

1️⃣ OpenAI

  • Add OpenAI credentials inside n8n
  • Insert your API key
  • Select preferred model (e.g., GPT-4o / GPT-4)

2️⃣ Telegram (Optional)

  • Create a Telegram Bot via BotFather
  • Insert Bot Token into Telegram node
  • Add your Chat ID

🛠 Webhook Configuration

Method: POST
Content-Type: multipart/form-data

Required Parameters

Parameter Type Required Description
file File Yes PDF document
mcq_count Number Yes Number of multiple-choice questions
essay_count Number Yes Number of essay questions
difficulty String Yes easy / medium / hard
language String Yes Output language

📥 Example Request

curl -X POST https://your-n8n-domain/webhook/examforge \
  -F "[email protected]" \
  -F "mcq_count=20" \
  -F "essay_count=5" \
  -F "difficulty=medium" \
  -F "language=Indonesian"