pdf-compressor

Documents

Compress large PDF files by resizing pages and optimizing images. Use when PDF file size is too large for sharing, uploading, or when Gemini generates oversized slides. Reduces file size by up to 98% while maintaining acceptable quality.

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How to use this skill

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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/pdf-compressor/SKILL.md

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PDF Compressor

Compress PDF files by converting pages to optimized images and rebuilding the PDF.

Workflow

Convert PDF pages to images at specified DPI
Resize images to target width (maintaining aspect ratio)
Compress as JPEG with quality setting
Rebuild PDF from compressed images

Usage

python scripts/compress.py "{pdf_path}" --width {width} --quality {quality} --output "{output_path}"

Parameters

Parameter	Required	Default	Description
pdf_path	Yes	-	Path to PDF file to compress
--width	No	1920	Page width in pixels
--quality	No	85	JPEG quality (1-100)
--dpi	No	150	DPI for PDF to image conversion
--output, -o	No	auto	Output path (default: {filename}_compressed.pdf)

Quality Presets

Use Case	Width	Quality	Expected Reduction
Web/Email	1280	75	~95%
Standard	1920	85	~90%
High Quality	2560	90	~80%
Print	3840	95	~60%

Examples

# Basic compression (default settings)
python scripts/compress.py "large_presentation.pdf"

# Web-optimized (smaller file)
python scripts/compress.py "slides.pdf" --width 1280 --quality 75

# High quality for presentations
python scripts/compress.py "report.pdf" --width 2560 --quality 90

# Custom output path
python scripts/compress.py "document.pdf" -o "document_small.pdf"

Requirements

Python packages: pdf2image, Pillow, img2pdf
System: poppler (for pdf2image)
- macOS: brew install poppler
- Ubuntu: apt-get install poppler-utils

Notes

Original PDF is not modified
Text becomes rasterized (not searchable)
Best for image-heavy presentations and slides
For text-heavy documents, consider Ghostscript instead