Compress PDF - 3 Quality Levels, No Upload, 100% Private
Compress PDF files instantly with 3 quality levels. Reduce file size up to 70% while preserving structure. No upload required, works offline. Your files never leave your browser. Free PDF compressor.
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PDF files only • Any size • 100% private
Fast Compression
Process PDFs instantly in your browser
100% Private
Files never leave your device
Smart Algorithm
Preserve structure while reducing size
Note about compression
This tool optimizes PDF structure and removes metadata. Results vary based on the original PDF. Already optimized PDFs may see minimal reduction. For PDFs with many images, compress the images first for better results.
How It Works
Our PDF compressor uses the following techniques to reduce file size:
- Metadata Removal - Removes author, title, creation date, and other metadata
- Object Stream Compression - Uses advanced compression for PDF objects
- Structure Optimization - Reorganizes PDF internal structure for efficiency
- Redundancy Elimination - Removes duplicate elements and unused resources
The compression works best on:
- PDFs with lots of metadata
- Documents created by scanning software
- PDFs that haven't been optimized before
- Files with redundant or duplicated content
Privacy & Security
Your files are 100% secure
All processing happens in your browser. Files are never uploaded to any server, ensuring complete privacy and security.
Troubleshooting
No size reduction?
- The PDF may already be optimized
- The file might contain mostly images (use image compression tools first)
- The PDF could be encrypted or protected
Error compressing?
- Make sure the file is a valid PDF
- Check if the PDF is password-protected
- Try a different compression level