Free PDF Compressor – Shrink Image PDFs Up to 80%, Unlimited
Fast, secure, and free PDF compression tool. Process files locally without uploading to servers.
Secure & Private
Process files locally without uploading
Lightning Fast
Compress PDFs in seconds
Quality Preserved
Maintain document quality
Ready to Track Your Compressions?
Start compressing PDFs to see your compression history here. Track file sizes, compression ratios, and easily redownload files.
How Our PDF Compressor Works
Advanced Compression
Our tool uses advanced algorithms to reduce PDF file size while maintaining document quality and readability.
Fast Processing
Quick compression process that delivers results in seconds, perfect for both small documents and large files.
Secure Processing
All files are processed securely in your browser. Your documents never leave your device, ensuring complete privacy.
Why Choose Our PDF Compressor?
Free to Use: No registration required, completely free PDF compression service available 24/7.
Privacy First: Client-side processing ensures your documents remain private and secure.
High Quality: Maintains document readability while achieving optimal file size reduction.
Cross-Platform: Works on all devices and browsers without additional software installation.
Complete PDF Compression Guide
📚 Document Types
Text-Heavy PDFs: Contracts, reports, books - mostly text, so compression is minimal unless they contain embedded images
Image-Rich PDFs: Brochures, portfolios - achieve 40-60% compression
Mixed Content: Presentations, magazines - achieve 50-70% compression
Scanned Documents: OCR documents - achieve 30-50% compression
⚙️ Compression Levels
Low (10-30%): Minimal compression, highest quality, best for professional documents
Medium (30-60%): Balanced compression, good quality, ideal for general use
High: Maximum compression — image-heavy PDFs can shrink up to ~80%, with reduced image quality; ideal for email attachments
💡 Best Practices
Before Compression: Remove unnecessary pages and content
File Size Targeting: Email limit is usually 25MB, consider your needs
Quality Check: Always review the compressed file before sharing
Backup Original: Keep the original file for future reference
Frequently Asked Questions
Technical Specifications & Compatibility
🌐 Browser Support
✅ Chrome 90+
✅ Firefox 88+
✅ Safari 14+
✅ Edge 90+
✅ Mobile browsers (iOS Safari, Chrome Mobile)
📄 PDF Standards
✅ PDF 1.3 to 1.7
✅ PDF/A (archival)
✅ Encrypted PDFs (password required)
✅ Form-enabled PDFs
✅ Multi-page documents
🔧 Technology Stack
📚 PDF-lib.js for processing
⚡ Web Workers for performance
🔒 Client-side only (no server)
💾 Local storage for history
🎨 Progressive Web App ready
More PDF Tools
View All ToolsNeed to do more than compress? Explore the full PDF toolkit below.
Merge PDF
Combine multiple PDF files into one document. Drag and drop to reorder pages before merging.
Split PDF
Split a PDF into multiple files by page ranges. Each range becomes its own downloadable document.
PDF to Image
Convert PDF pages to PNG or JPEG images with adjustable quality and resolution.
Rotate PDF
Rotate PDF pages by 90, 180, or 270 degrees. Rotate individual pages or all pages at once.
Watermark PDF
Add custom text watermarks to your PDF with adjustable font, color, opacity, and position.
Extract Pages
Select and extract specific pages from a PDF into a new, smaller document.
Compress PDF to Size
Shrink a PDF to an exact target — 100KB, 200KB, 500KB, or 1MB — for email limits, forms, and portals.
PDF to JPG
Convert PDF pages into smaller JPG images that are easy to share by email and social media.