PDF Compressor
Reduce PDF file size while maintaining quality. Fast, private, and completely free.
Simply upload your PDF and choose your compression level. All processing happens locally in your browser - your files never leave your device.
Upload PDF File
Drag and drop your PDF here or click to browse
Maximum file size: 100MB
How It Works
Simple 4-step process to compress your PDF
Upload PDF
Select the PDF file you want to compress
Select Level
Choose the compression level that fits your needs
Compress
Click start to begin compression
Download
Download your compressed PDF file
Why Use Our PDF Compressor?
Professional PDF compression with privacy and quality
Complete Privacy
All processing happens in your browser. Your files are never uploaded to any server.
Smart Compression
Choose from multiple compression levels to balance file size and quality.
Quality Preservation
Advanced algorithms maintain document readability while reducing size.
Instant Results
See estimated file size before compression and download immediately.
Free to Use
No registration, no limits, completely free forever.
Works Offline
Once loaded, the tool works entirely offline in your browser.
Supported Formats
Compress PDF documents to reduce file size
Upload a PDF document (up to 100MB)
Download compressed PDF document
Related Tools
Explore our other PDF tools
Frequently Asked Questions
Is my PDF file safe when using this tool?
Yes, absolutely. All processing happens locally in your browser using JavaScript. Your files are never uploaded to any server, ensuring complete privacy and security.
How much can I reduce my PDF file size?
Compression results vary significantly based on your PDF content. Text-only PDFs: 5-15% reduction. PDFs with optimized images: 10-25% reduction. PDFs with unoptimized images: 30-50% reduction possible. Note: Due to browser limitations, this tool uses PDF structure optimization rather than image recompression, so results may be less than server-side tools.
Will compression affect the quality of my PDF?
This tool uses PDF structure optimization (object streams, metadata removal) without modifying images or text. Your visual quality remains 100% preserved. For more aggressive compression with image quality loss, consider using dedicated desktop software.
What compression level should I choose?
All levels preserve visual quality. 'Low' minimally optimizes structure. 'Medium' removes metadata and uses object streams. 'High' and 'Extreme' apply the same optimizations but with increasingly aggressive size estimates. The actual compression achieved depends on your PDF's internal structure.
Is there a file size limit?
There's no strict file size limit. However, very large PDF files may take longer to process depending on your device's capabilities.