About PDF Compressor

Our advanced PDF compressor uses multi-pass adaptive compression to achieve market-leading file size reduction. Set your exact target size and let the engine find the optimal balance between quality and file size.

Features:

• Set your exact maximum file size target (MB or KB)
• Multi-pass adaptive compression with smart quality estimation
• Compresses both JPEG and PNG-like embedded images
• Handles CMYK, ICC-based, and grayscale color spaces
• Progressive image downscaling for maximum reduction
• Strips metadata, XMP data, and embedded thumbnails
• PDF structure optimization and unused object removal
• Works entirely in your browser — files never leave your device
• Completely free with no signup or watermarks

How to Use:

1. Upload your PDF file by dragging and dropping or clicking the upload area
2. Enter your desired maximum file size in MB or KB
3. Click "Compress PDF" and wait for the multi-pass compression to finish
4. Download your compressed PDF

How It Works:

The compressor first analyzes your PDF to identify all embedded images and their formats. It then estimates the optimal compression settings based on your target size and applies multi-pass adaptive compression. JPEG images are re-encoded at optimized quality levels, while PNG-like images are converted to efficient JPEG format. The engine also strips metadata, XMP data, embedded thumbnails, and optimizes the PDF structure. Progressive image downscaling is applied when needed for maximum compression.

Privacy & Security:

All compression happens directly in your web browser using client-side JavaScript. Your files are never uploaded to our servers, ensuring complete privacy and security. No data is stored or transmitted.