PDF Compressor
Compress PDF online for free, reducing file size instantly
Free PDF Compressor Online | Reduce PDF File Size
Compress PDF documents online and reduce their file size for free. Choose your desired compression level (high, medium, low) and get a lighter file while maintaining readability. All processing happens in your browser for maximum privacy. No file uploads, no server processing.
100% local processing in your browser. No files are sent to external servers.
Drag PDF here
or click to browse
How It Works
- Drag and drop your PDF or click to browse
- Choose compression level: High, Medium, or Low
- Click Compress PDF and wait for processing
- View original and compressed sizes with the percentage saved
- Download your compressed PDF with a single click
Frequently Asked Questions
What is the difference between compression levels?
High compression reduces file size the most but may reduce image quality. Medium offers a good balance. Low reduces size to a lesser extent while better preserving visual quality.
Are my files secure?
Yes, absolutely. All compression happens locally in your browser using JavaScript. Your PDF is never uploaded to external servers. Your documents never leave your device.
What is the maximum PDF size?
There is no strict limit, but very large PDFs (over 100MB) may take more time. Compression works best with PDFs containing high-resolution images.