PDF Modifier

A collection of PDF editing applications that allow users to upload, modify, and download PDF files. This repository contains three different implementations to suit different use cases.

🎯 Features

All implementations provide the following core functionality:

• Upload PDFs: Load PDF documents via file picker or drag-and-drop
• Page Preview: View all pages as thumbnails in a responsive grid
• Remove Pages: Delete unwanted pages with multi-selection support
• Reorder Pages: Rearrange pages using drag-and-drop
• Add Pages: Insert pages from other PDF files
• Export: Download the modified PDF with all changes preserved

📦 Implementations

This repository contains three different implementations of the PDF modifier:

1. Web Application (pdf-modifier-web)

A modern web application built with Nuxt.js for browser-based PDF editing.

Technology Stack:

• Nuxt.js 4.x
• Vue 3 with Composition API
• TypeScript
• pdf-lib (PDF manipulation)
• pdfjs-dist (PDF rendering)

Setup:

cd pdf-modifier-web
npm install
npm run dev

The application will be available at http://localhost:3000

Build for Production:

npm run build
npm run preview

2. Electron Desktop App (pdf-modifier-electron)

A cross-platform desktop application built with Electron for macOS, Windows, and Linux.

Technology Stack:

• Electron 28.x
• pdf-lib (PDF manipulation)
• pdfjs-dist (PDF rendering)
• HTML/CSS/JavaScript

Setup:

cd pdf-modifier-electron
npm install
npm run dev

Build for macOS:

npm run build

This creates a distributable .dmg and .zip file in the dist folder.

3. Native macOS App (pdf-modifier-macOS)

A native macOS application built with Swift and SwiftUI for optimal performance and integration.

Technology Stack:

• Swift
• SwiftUI
• PDFKit (Apple's native PDF framework)
• AppKit

Requirements:

• macOS 13.0 (Ventura) or later
• Xcode 15.0 or later

Setup:

cd pdf-modifier-macOS
open PDFModifier.xcodeproj

Press ⌘R in Xcode to build and run.

Build from Command Line:

xcodebuild -project PDFModifier.xcodeproj -scheme PDFModifier -configuration Debug build

🚀 Quick Start

Choose the implementation that best fits your needs:

• Web App: Best for browser-based usage, no installation required
• Electron App: Best for cross-platform desktop application with consistent UI
• Native macOS App: Best for macOS users who want optimal performance and native integration

📝 Usage

All implementations follow a similar workflow:

1. Open a PDF: Click "Open PDF" or drag a PDF file into the window
2. Edit Pages:
   • Click on thumbnails to select pages (hold Cmd/Ctrl for multi-select)
   • Drag thumbnails to reorder pages
   • Click "Remove Selected" or press Delete to remove pages
   • Click "Add Pages" to insert pages from another PDF
3. Export: Click "Export PDF" or "Download" to save your changes

🏗️ Architecture

Each implementation follows best practices for its respective platform:

• Web App: Nuxt.js with Vue 3 Composition API and TypeScript
• Electron App: Main process (Node.js) + Renderer process (web technologies)
• Native macOS App: MVVM pattern with SwiftUI and PDFKit

🔒 Security

• All PDF processing happens client-side (no server uploads)
• Input sanitization and validation
• Secure file handling
• No data persistence (privacy-focused)

📄 License

Copyright © 2025. All rights reserved.

🤝 Contributing

Each implementation is self-contained in its respective directory. Please refer to the individual README files for implementation-specific details.