Ghostscript powered

PDF Compressor

Professional-grade PDF compression with advanced image resampling, grayscale conversion, and quality presets—all running locally in your browser.

by Design Duck Labs

No uploads • Works offline after engine download
Average reduction
50-85%
Max input size
100 MB
Engine download
16 MB

One-time cache

Upload PDF

Drop your PDF here or click to browse

Advanced image compression • Maximum file size: 100MB

Supports: PDF up to 100MB

Quality Presets

Choose a preset to auto-configure quality, DPI, and processing rules. Adjust any control to switch into custom mode.

Advanced Image Settings

Image Quality70%
High CompressionHigh Quality
Maximum DPI150 DPI
72 DPI300 DPI600 DPI
Limit Image Dimension1920 px
800px2400px4000px

Image Processing Options

Advanced Compression

Upload a PDF file to begin advanced compression

Advanced Features

Canvas-based image compression with quality control
Intelligent DPI reduction and image resizing
PNG to JPEG conversion for better compression
Progressive JPEG encoding for web optimization
Advanced metadata and structure optimization

Why this tool

Advanced PDF Compression Technology

Professional-grade image processing and optimization

Advanced image processing

Each embedded image is extracted and optimized with intelligent DPI reduction, PNG to JPEG conversion, and progressive encoding tuned to your preset.

Privacy & performance

Runs entirely inside your browser via Ghostscript and Canvas APIs so sensitive PDFs never leave your device while still delivering pro-grade compression.

Detailed analytics

Live stage progress and post-run stats quantify compression ratios, savings, and image optimizations applied for every file you process.

Pro tip: Use the Web preset for maximum reduction or Print to preserve prepress fidelity.