Images to PDF Converter

A modern Python package that converts images in a folder into a professional PDF presentation, with each image displayed as a slide. Features automatic image analysis, resolution detection, and intelligent page sizing.

✨ Features

• 🖼️ Multi-format Support: PNG, JPG, JPEG, GIF, and BMP
• 📊 Automatic Analysis: Analyzes resolution, DPI, format, and aspect ratio
• 📐 Smart Sizing: Automatically adjusts PDF page size based on image dimensions
• 🎯 Aspect Ratio Preservation: Maintains image proportions and centers content
• ⚡ Fast Processing: Built with Pillow and ReportLab for optimal performance
• 🖥️ CLI & API: Use as command-line tool or Python library
• 📦 Modern Packaging: Built with UV and follows Python packaging best practices

📋 Table of Contents

• Installation
• Quick Start
• Usage
  • Command Line Interface
  • Python API
• Requirements
• Examples
• Development
• Publishing
• License

🚀 Installation

From PyPI (once published)

pip install images2pdf-slides

From Source

Using UV (Recommended)

# Clone the repository
git clone https://github.com/Maheshkumar-novice/images2pdf-slides.git
cd images2pdf-slides

# Install with UV
uv pip install -e .

Using pip

# Clone the repository
git clone https://github.com/Maheshkumar-novice/images2pdf-slides.git
cd images2pdf-slides

# Install in editable mode
pip install -e .

🏃 Quick Start

1. Prepare your images: Place images in a folder (e.g., images/)

2. Run the converter:

   images-to-pdf images/
   

3. Get your PDF: Find output_slides.pdf in the current directory

That's it! 🎉

📖 Usage

Command Line Interface

The package installs the images-to-pdf command:

# Use default 'images' folder and output filename
images-to-pdf

# Specify a custom input folder
images-to-pdf photos/

# Specify custom input folder and output filename
images-to-pdf photos/ -o presentation.pdf

# Show help message
images-to-pdf --help

# Show version
images-to-pdf --version

CLI Options

Python API

Use the package in your Python scripts:

from images_to_pdf import create_pdf_from_images, analyze_image

# Create PDF from all images in a folder
create_pdf_from_images("photos/", "output.pdf")

# Analyze a single image
info = analyze_image("photo.jpg")
print(f"Resolution: {info['width']}x{info['height']} pixels")
print(f"Format: {info['format']}")
print(f"DPI: {info['dpi']}")
print(f"Aspect Ratio: {info['aspect_ratio']:.2f}")

API Reference

create_pdf_from_images(images_folder, output_pdf)

Convert all images in a folder to a PDF presentation.

Parameters:

• images_folder (str): Path to folder containing images
• output_pdf (str): Output PDF filename

Returns: None

Supported formats: PNG, JPG, JPEG, GIF, BMP

analyze_image(image_path)

Analyze properties of a single image.

Parameters:

• image_path (str | Path): Path to image file

Returns: Dictionary with keys:

• path: Path to the image
• width: Image width in pixels
• height: Image height in pixels
• mode: Color mode (e.g., 'RGB', 'RGBA')
• format: Image format (e.g., 'PNG', 'JPEG')
• dpi: DPI tuple (x, y)
• aspect_ratio: Width/height ratio

📦 Requirements

• Python: 3.8 or higher
• Dependencies:
  • Pillow >= 10.0.0 (Image processing)
  • ReportLab >= 4.0.0 (PDF generation)

All dependencies are automatically installed when you install the package.

💡 Examples

Example 1: Basic Usage

# Place images in 'images' folder
mkdir images
cp ~/Pictures/*.jpg images/

# Convert to PDF
images-to-pdf

# Output: output_slides.pdf created with all images as slides

Example 2: Custom Output

# Create presentation with custom name
images-to-pdf vacation-photos/ -o vacation-2025.pdf

Example 3: Python Script

from pathlib import Path
from images_to_pdf import create_pdf_from_images, analyze_image

# Analyze all images first
image_folder = Path("screenshots")
for img_file in image_folder.glob("*.png"):
    info = analyze_image(img_file)
    print(f"{img_file.name}: {info['width']}x{info['height']}")

# Create PDF
create_pdf_from_images("screenshots", "documentation.pdf")

Example Output

When you run the converter, you'll see detailed analysis:

Found 5 images

================================================================================
Image: Screenshot 2025-11-20 at 4.37.39 PM.png
  Resolution: 2880 x 1800 pixels
  Format: PNG
  Color Mode: RGBA
  DPI: (144.0, 144.0)
  Aspect Ratio: 1.60

Image: Screenshot 2025-11-20 at 4.37.47 PM.png
  Resolution: 2880 x 1800 pixels
  Format: PNG
  Color Mode: RGBA
  DPI: (144.0, 144.0)
  Aspect Ratio: 1.60

[... more images ...]

================================================================================

Creating PDF: output_slides.pdf

Adding slide 1/5: Screenshot 2025-11-20 at 4.37.39 PM.png
Adding slide 2/5: Screenshot 2025-11-20 at 4.37.47 PM.png
Adding slide 3/5: Screenshot 2025-11-20 at 4.38.08 PM.png
Adding slide 4/5: Screenshot 2025-11-20 at 4.38.16 PM.png
Adding slide 5/5: Screenshot 2025-11-20 at 4.38.44 PM.png

✓ PDF created successfully: output_slides.pdf
  Total pages: 5

🛠️ Development

Setting Up Development Environment

# Clone the repository
git clone https://github.com/Maheshkumar-novice/images2pdf-slides.git
cd images2pdf-slides

# Install with development dependencies using UV
uv sync --all-extras

# Or using pip
pip install -e ".[dev]"

Project Structure

images2pdf-slides/
├── src/
│   └── images_to_pdf/
│       ├── __init__.py      # Package initialization and exports
│       ├── core.py          # Core conversion logic
│       ├── cli.py           # Command-line interface
│       └── py.typed         # Type hints marker
├── dist/                     # Built distributions (gitignored)
├── pyproject.toml           # Package configuration
├── LICENSE                  # MIT License
├── README.md               # This file
└── .gitignore              # Git ignore rules

Development Workflow

# Format code with black
uv run black src/

# Lint code with ruff
uv run ruff check src/

# Run type checking with mypy
uv run mypy src/

# Run tests (if you add them)
uv run pytest

# Test the CLI locally
uv run images-to-pdf images/

Adding Features

1. Fork the repository
2. Create a feature branch: git checkout -b feature-name
3. Make your changes in src/images_to_pdf/
4. Test your changes locally
5. Submit a pull request

📤 Publishing

Building the Package

# Build distribution files
uv build

# Output: dist/images_to_pdf-0.1.0-py3-none-any.whl
#         dist/images_to_pdf-0.1.0.tar.gz

Publishing to PyPI

Prerequisites

1. Create accounts:

   • Test PyPI: https://test.pypi.org/account/register/
   • Production PyPI: https://pypi.org/account/register/

2. Enable 2FA (required)

3. Create API token:

   • Go to Account Settings → API tokens
   • Create token for this project

Publish Steps

# 1. Test on Test PyPI first (recommended)
uv publish --publish-url https://test.pypi.org/legacy/

# 2. Verify installation from Test PyPI
pip install --index-url https://test.pypi.org/simple/ images2pdf-slides

# 3. If everything works, publish to production PyPI
uv publish

# 4. Install from PyPI
pip install images2pdf-slides

Publishing with Token

# Set environment variable (recommended)
export UV_PUBLISH_TOKEN="pypi-..."
uv publish

# Or pass directly
uv publish --token pypi-...

Version Management

Update version in pyproject.toml:

[project]
name = "images-to-pdf"
version = "0.2.0"  # Increment version

Follow Semantic Versioning:

• MAJOR: Breaking changes (e.g., 1.0.0 → 2.0.0)
• MINOR: New features, backward compatible (e.g., 1.0.0 → 1.1.0)
• PATCH: Bug fixes (e.g., 1.0.0 → 1.0.1)

🤝 Contributing

Contributions are welcome! Here's how you can help:

1. Report bugs: Open an issue describing the problem
2. Suggest features: Open an issue with your idea
3. Submit PRs: Fork, create a branch, make changes, submit PR
4. Improve docs: Help make documentation better

Please ensure your code:

• Follows PEP 8 style guidelines
• Includes docstrings for functions
• Works with Python 3.8+

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

MIT License

Copyright (c) 2025 Maheshkumar

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction...

🔗 Links

• Homepage: https://github.com/Maheshkumar-novice/images2pdf-slides
• PyPI: https://pypi.org/project/images2pdf-slides/ (once published)
• Issues: https://github.com/Maheshkumar-novice/images2pdf-slides/issues
• Documentation: This README

❓ FAQ

Q: What image formats are supported?

A: PNG, JPG, JPEG, GIF, and BMP formats are supported.

Q: How are images ordered in the PDF?

A: Images are sorted alphabetically by filename. To control the order, name your files with prefixes like 01-image.png, 02-image.png, etc.

Q: Can I customize page sizes?

A: Currently, page sizes are automatically calculated based on the first image's aspect ratio. For custom page sizes, you can modify the core.py file or use the Python API to build your own logic.

Q: What if my folder has no images?

A: The program will display "No images found in {folder}" and exit gracefully.

Q: Does this work with very large images?

A: Yes, but be aware that very large images will increase PDF file size. The images are not compressed beyond their original format.

Q: Can I use this in my commercial project?

A: Yes! The MIT license allows commercial use. Just include the license notice.

🙏 Acknowledgments

Built with:

• Pillow - Python Imaging Library
• ReportLab - PDF generation
• UV - Fast Python package manager

Made with ❤️ by Maheshkumar

Star ⭐ this repo if you find it helpful!