Free Online PDF Compressor
Compress PDF files and reduce size with our free online PDF compressor. Upload single or multiple PDFs. Choose from three compression levels: low for best quality, medium for balanced results, high for maximum compression. Browser-based processing ensures complete privacy. No file uploads to servers. Works with scanned documents, presentations, reports, ebooks. Perfect for email attachments, web uploads, cloud storage. Maintain readable quality while significantly reducing file size. Download compressed PDFs instantly.
Key Features
Multiple Compression Levels: Low compression maintains highest quality with modest size reduction. Medium compression balances quality and file size. High compression maximizes size reduction for storage optimization. Choose based on your needs.
Batch Processing: Upload and compress multiple PDF files simultaneously. Process entire folders at once. Save time on bulk operations. Individual progress tracking. Download all files together.
Browser-based Security: All PDF compression happens locally in your browser. Files never uploaded to external servers. Complete privacy guaranteed. Delete files immediately after download. GDPR compliant.
Quality Preservation: Smart compression algorithms reduce file size while maintaining readability. Text remains sharp. Images optimized without severe degradation. Perfect balance of size and quality.
Common Use Cases
Email Attachments: Compress PDFs to fit email size limits. Most email providers limit attachments to 25MB. Reduce large documents for easy sharing. Send multiple files in single email. Professional communication.
Web Uploads: Optimize PDFs for website uploads. Faster page loading times. Better user experience. Reduce hosting bandwidth costs. SEO benefits from smaller files.
Cloud Storage: Save space in Google Drive, Dropbox, OneDrive. Store more files in limited storage. Faster sync times. Reduce storage costs. Archive optimization.
Mobile Sharing: Smaller PDFs transfer faster on mobile networks. Save cellular data. Quick WhatsApp and messaging app sharing. Better mobile experience.
How It Works
Upload PDF files using file picker or drag-drop. Multiple files supported for batch compression. Select compression level based on needs. Low maintains highest quality. Medium provides balance. High maximizes compression. Click compress button to start processing. Browser loads PDF structure using PDF.js library. Images extracted and re-compressed at selected quality level. Metadata removed to save space. Redundant data optimized. New PDF created with reduced size. Download individual compressed files or all at once as ZIP. Original files remain untouched. Repeat process anytime needed.
Compression Tips
Best Results: PDFs with many images compress more effectively. Scanned documents see significant size reduction. Text-heavy PDFs have limited compression potential. Try medium compression first for balance. Use high compression only when size is critical. Preview compressed file before sharing to verify quality. Re-compress if quality unsatisfactory. Keep original files as backup.
Start Compressing PDFs Now!
Upload your PDF files above and reduce size instantly!