SumPDF

SumPDF is a free and open-source desktop application built with Compose for Desktop that allows you to effortlessly combine multiple PDF files and convert various document types (SVG, PNG, JPG, JPEG, ODT, DOC, DOCX) to PDF; Enhance your PDF workflow by extracting specific pages, splitting files by range, deleting selected pages, reordering pages to your preference, and merging the remaining pages into a new document. All features are free and open-source.

🆕 What's New in v1.3.0

🔥 Advanced PDF Splitting

• 📄 Complete Page Extraction: Split any PDF into individual pages with real-time preview
• 🎯 Range-Based Splitting: Extract specific page ranges (e.g., pages 5-15) for focused document creation
• 🎛️ Interactive Page Management: Reorder, delete, and merge extracted pages with intuitive interface
• ⚡ Real-time UI Updates: Watch pages appear as interactive cards during the extraction process

🎨 Enhanced User Experience

• 🌟 Dynamic Main Screen: New staggered grid layout with smooth spring animations
• 🎬 Polished Animations: Smooth transitions for page operations and navigation
• 📊 Better Visual Feedback: Clear progress indicators and responsive UI elements
• 🔍 Comprehensive Logging: Detailed operation tracking for better troubleshooting

View Full Release Notes →

✨ Features

📄 Combine PDFs

• Merge multiple PDF files into a single document
• Drag & drop support for easy file selection
• Custom output file naming and location
• Preserves original document quality

🔄 Convert to PDF

• Text files (.txt) - Instant conversion with proper formatting
• Images (.png, .jpg, .jpeg) - Maintains aspect ratio and quality
• Vector graphics (.svg) - Rasterization via Apache Batik
• Documents (.doc, .docx, .odt) - Professional conversion via LibreOffice

✂️ Split PDFs (New!)

• Complete Splitting: Extract all pages into individual files
• Range Extraction: Extract specific page ranges (e.g., pages 10-25)
• Interactive Management: Reorder, delete, and merge extracted pages
• Real-time Preview: See extracted pages as they're processed

🎨 User Experience

• Modern UI with dark/light mode support
• Real-time progress tracking with file-by-file feedback
• Drag & drop interface for intuitive file management
• Recent folders for quick access to output locations
• Batch processing - convert multiple files simultaneously
• Smooth animations and responsive interactions

Document Conversion (doc/docx/odt)

• LibreOffice must be installed separately
  • Windows: Download from LibreOffice.org
  • Linux: sudo apt install libreoffice (Ubuntu/Debian) or equivalent
  • macOS: Install via Homebrew brew install --cask libreoffice

⚡ Performance Expectations

File Type	Conversion Speed	Notes
Text (.txt)	Instant	< 1 second
Images (.png, .jpg, .jpeg)	Instant	< 1 second
Vector (.svg)	Almost instant	~ 1 second
Documents (.doc, .docx, .odt)	~9 seconds per file	Requires LibreOffice startup
PDF Splitting	~150ms per page	Real-time preview available

Note: Document conversions are slower due to LibreOffice process management. The first conversion may take longer as LibreOffice initializes.

🖥️ Screenshots

Home Screen

Combine PDFs

Convert to PDF

🚀 Installation

Linux Installation (Recommended)

Easy installation via APT repository:

📦 Install from my APT Repository

This is the recommended method for Ubuntu/Debian users as it provides automatic updates and dependency management.

Download Releases

1. Go to Releases
2. Download the appropriate installer:

• Windows: .exe or .msi installer
• Linux: .deb package (manual installation)

Manual Linux Installation

sudo dpkg -i sumpdf_1.3.1-1_amd64-wm.deb

sudo apt install -f

Windows Installation

• Run the .exe installer and follow the setup wizard
• Administrator privileges may be required

🔧 Build from Source

Prerequisites

• JDK 17+
• Gradle 8.0+

Build Steps

# Clone the repository
git clone https://github.com/zahid4kh/sumpdf.git
cd sumpdf

# Run the application
./gradlew :run

# Or run with hot-reload for development
./gradlew :runHot --mainClass SumPDF --auto

# Create distribution packages
./gradlew packageDeb          # Linux .deb
./gradlew packageMsi          # Windows .msi
./gradlew packageExe          # Windows .exe
./gradlew packageDmg          # macOS .dmg

🛠️ Technology Stack

• UI Framework: Compose for Desktop
• Language: Kotlin
• PDF Processing: Apache PDFBox 3.0.3
• Document Conversion: JodConverter + LibreOffice
• SVG Processing: Apache Batik
• Dependency Injection: Koin
• Serialization: Kotlinx Serialization

🐛 Known Issues & Limitations

• LibreOffice Required: Document conversion (.doc, .docx, .odt) requires LibreOffice installation
• Conversion Speed: Document conversion is slower (~9 seconds per file) due to LibreOffice overhead

🤝 Contributing

Contributions are welcome! Please feel free to submit issues, feature requests, or pull requests.

Development Setup

1. Install LibreOffice for testing document conversion
2. Use ./gradlew :runHot for hot-reload development
3. Test on multiple platforms before submitting PRs

📝 License

This project is licensed under the Apache 2.0 License. See LICENSE for more details.

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Made with ❤️ using Kotlin and Compose for Desktop