Compress PDF Files
Reduce PDF file size while maintaining quality. All processing happens locally in your browser for complete privacy.
Compress PDF Tool
Drag & drop PDF file
or click to browse (Supports PDF files only)
Compression Results
Original File
File size before compression
Compressed File
File size after compression
Size Reduction
Space saved
Complete Guide to PDF Compression
Our PDF compression tool intelligently reduces file sizes while preserving document quality. Unlike cloud-based services, all processing happens locally in your browser using advanced optimization techniques.
How PDF Compression Works
- Image Optimization: Reduces image resolution and applies compression algorithms to embedded images.
- Font Subsetting: Removes unused font characters to reduce font embedding overhead.
- Object Streams: Compresses PDF objects and streams for efficient storage.
- Metadata Cleaning: Removes unnecessary metadata and unused resources.
When to Use PDF Compression
- Email Attachments: Reduce file sizes for email limits (usually 25MB)
- Web Uploads: Meet website upload size restrictions
- Storage Optimization: Save disk space with compressed archives
- Faster Loading: Improve document loading times for web applications
Frequently Asked Questions
It depends on the compression level selected. Our Balanced setting maintains excellent quality while reducing file size by 50-70%. High compression may reduce image quality but is ideal for text-heavy documents.
Typical compression rates are 50-80% for image-heavy PDFs and 10-30% for text-only PDFs. Files with embedded high-resolution images see the most significant reduction.
Yes! Scanned PDFs (image-based) benefit most from compression. We optimize JPEG compression and can reduce file sizes by up to 90% while maintaining readability.