Exam Buddy - Stop studying what you already know

Found knowledge gaps but stuck doing full generic tests? Convert any content—webpages, PDFs, or notes—into targeted, adaptive AI quizzes built for active recall and faster mastery.

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Inspiration

From high school to college to professional certifications, I've consistently faced one frustrating problem: I couldn't find study materials that targeted my actual weak spots.

Recently, while preparing for an important exam, I kept making mistakes on one specific topic: "fixed prepositions." I knew exactly where I was struggling, so I searched online for targeted practice.

What did I find?

  • Long articles with 1000+ examples (passive reading that didn't stick)
  • Generic mock papers where only 2-3 out of 50 questions were relevant
  • Hours wasted reviewing topics I'd already mastered

I just wanted to tell someone: "I'm weak at fixed prepositions—quiz me on that, see where I mess up, and keep going until I master it."

I tried building a basic HTML quiz page myself, but it was time-consuming and clunky. That's when it hit me: this isn't just my problem—it's every student's problem.

We all know our weak spots—the hard part is actually fixing them efficiently.

What we actually need is a study coach who can:

  • Generate practice on our weak spots instantly
  • Adapt based on our performance
  • Give feedback that actually helps us improve

But personal tutors are expensive and rarely available when you need them most—like at 2 AM during exam week. That's when I realized: Chrome's built-in AI could be that coach—instant, private, powerful, and always available. No subscriptions, no data leaving your device, no limits.

That's when Exam Buddy was born — your 24/7 AI study coach that converts any content into adaptive quizzes, identifies your knowledge gaps, and guides you to mastery with intelligent feedback. All powered by on-device AI, completely private and offline.

Solution & Features

Exam Buddy is an offline AI study coach that turns any content—webpages, PDFs, or notes—into personalized quizzes targeting your weak spots. It runs entirely inside Chrome, powered by on-device AI, keeping learning private, fast, and distraction-free.

Key Features

  1. Instant Quiz Generation – Create adaptive quizzes from any text with customizable question types (MCQ, True/False, Fill-in-the-blank, Subjective)
  2. Smart AI Evaluation – Contextually evaluates subjective answers, not just keyword matching
  3. Adaptive Learning – Identifies knowledge gaps and suggests targeted practice areas
  4. Bookmark & Review – Save difficult questions for later practice
  5. Comprehensive Analytics – Track progress, identify trends, and measure improvement offline
  6. Pause & Resume – Continue from where you left off, even after browser restarts

API Integration & Technical Implementation

Chrome Extension & AI APIs Used

  • chrome.sidePanel - Persistent UI panel for quiz interface
  • chrome.contextMenus - "Start Quiz with Exam Buddy" right-click menu integration
  • chrome.runtime - Secure messaging between UI, content scripts, and background services
  • chrome.storage.local - On-device persistence for quizzes, bookmarks, and analytics
  • chrome.aiOriginTrial.languageModel - Core AI platform providing access to:
    • Prompt API - Generates quizzes, evaluates answers, and creates study recommendations with structured output
    • Summarizer API - Compresses long documents to focus on key educational concepts

Technical Architecture

  • Frontend: React + Vite + TailwindCSS for responsive UI
  • Content Processing: Readability.js for webpage cleanup, PDF.js for document parsing
  • AI Pipeline: Multi-stage processing with validation and repair systems
  • State Management: Custom React hooks with Chrome storage integration

AI Processing Pipeline

  1. Content Extraction - Content scripts and Readability.js extract clean text; PDF.js handles document parsing
  2. Intelligent Summarization - Chrome's Summarizer API condenses long documents while preserving educational value
  3. Structured Quiz Generation - Chrome's Prompt API with JSON schemas creates validated questions
  4. AI Answer Evaluation - Subjective answers evaluated contextually using Prompt API
  5. Auto-Repair System - Validates and fixes malformed AI output automatically

Quick Start

pre-build extension for ready to use

Download the latest release from Releases and install in Chrome:

  1. Extract the zip file
  2. Go to chrome://extensions
  3. Enable "Developer mode"
  4. Click "Load unpacked" and select the extracted folder

Build from Source

  1. Clone the repository:

    git clone https://github.com/AnchitSingh/exam-buddy.git
cd exam-buddy

  2. Install dependencies:

    npm install

  3. Build the extension:

    npm run build

  4. Load in Chrome:

    • Navigate to chrome://extensions
    • Enable Developer mode (top right)
    • Click Load unpacked
    • Select the dist folder
    • Pin the extension and start learning! 🎉

Future Plans

  • AI-powered study plans and curriculum adaptation
  • Collaboration features for group learning

Vision: A completely private, always-available AI tutor that knows your learning patterns, adapts to your style, and runs entirely offline.

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