How much can PDF file size be reduced?
Typically 40-80% reduction depending on content. Image-heavy PDFs compress more (up to 90%). Text-only PDFs compress 20-40%. Our smart compression optimizes images while keeping text sharp and readable.
PDF Compress
Compress PDF files online to reduce file size and improve sharing. Free tool with no registration required. Supports all PDF document types.
Common Questions
Frequently Asked Questions
Everything you need to know about using our PDF Compress
PDF Compress - Frequently Asked Questions
Will compression affect PDF quality?
No visible quality loss! We use lossless compression for text and intelligent image optimization. Choose 'Low' (smallest size, slightly lower image quality), 'Medium' (balanced), or 'High' (best quality, moderate compression).
Is there a file size limit?
PDFs up to 100MB can be compressed. That's approximately 1,000 pages with images. For larger files, split into sections first. Compressed files download instantly after processing in your browser.
Can I compress scanned PDFs?
Yes! Scanned PDFs (images of documents) often compress 60-80% by optimizing the embedded images. OCR text layers are preserved. Perfect for compressing scanned contracts, receipts, and old documents.
Will links and form fields still work?
Absolutely! All PDF functionality is preserved: clickable links, form fields, bookmarks, annotations, and metadata. Only the file size changes - all interactive features remain fully functional.
About This Tool
What It Does
Compress PDF files online for free and reduce file sizes by up to 80%. Our PDF compressor optimizes images, removes redundant data, and applies smart compression while preserving text quality and readability. Perfect for email attachments, website uploads, government portal submissions, and storage optimization. Choose from Low, Medium, or High compression levels.
Technology
How It Works
Upload your PDF file up to 100MB. Select compression level: Low (minimal quality loss, 20-30% reduction), Medium (balanced quality, 40-60% reduction), or High (maximum compression, 70-80% reduction). The tool analyzes every page, optimizes embedded images, and removes unnecessary metadata. Download your compressed PDF instantly. All processing happens in your browser.
Popular Uses
Common Use Cases
1
Email attachments - compress PDFs to fit under Gmail's 25MB and Outlook's 20MB limits
2
Website PDFs - reduce file sizes for faster downloads and better page speed scores
3
Government portals - meet file size requirements for tax filing and permit applications
4
Cloud storage - optimize document archives to reduce Dropbox and Google Drive usage
5
Mobile sharing - compress large PDFs for quick sharing on WhatsApp and Messenger
Compatibility
Supported Formats
PDF
Comparison
How We Compare
| Feature | Keynou | SmallPDF | iLovePDF |
|---|---|---|---|
| Price | Free | Free/Premium | Free/Premium |
| Privacy | Browser-based | Cloud upload | Cloud upload |
| Compression Ratio | Up to 80% | Up to 70% | Up to 75% |
| File Size Limit | 100MB | Free: 15MB | Free: 200MB |
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