Compress PDF
Reduce your PDF file size while maintaining excellent quality
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📥 Download Processed FileHow the Compress PDF Tool Works
Easy 4-step workflow to complete your document processing.
1
Step 1
Upload your large PDF file.
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Step 2
Select your compression level: 'Low', 'Recommended', or 'Extreme'.
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Step 3
Click 'Compress PDF' to process.
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Step 4
View original vs compressed sizes, and download your smaller PDF.
Core Benefits of Our Free Tool
- ✅ Extreme compression option achieves up to 90% size reduction.
- ✅ Displays precise file sizes and size reduction percentages.
- ✅ Secure temporary file handling protects your private documents.
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📖 Recommended Reading
How to Compress a PDF Without Losing Quality (2026 Guide) →
Compress PDF - Frequently Asked Questions (10 FAQs)
Get answers to common queries regarding security, speeds, and bounds of this tool.
We offer: 'Extreme' (maximum compression, smaller file size, slight quality loss), 'Recommended' (perfect balance of quality and size), and 'Low' (high quality, less compression).
Yes, OptaPDF offers 100% free compression without any pricing plans, premium tiers, or download watermarks.
No, our optimization engine focuses on down-scaling high-res images and cleaning up redundant metadata, leaving text sharp and readable.
Depending on the images inside your PDF, file sizes can often be compressed by 30% to 90%.
Yes, we prioritize security. All uploads are encrypted in transit and automatically deleted within 30 minutes of completion.
The output file will have '_compressed.pdf' appended to its base name (e.g., x_compressed.pdf).
You must decrypt the PDF with our Unlock PDF tool before compressing it.
Yes! The results section clearly shows the original size, the revised size, and the percentage of saved space.
Yes, our responsive tool works on all mobile and tablet browsers.
Try running it with the 'Extreme Compression' setting to get the smallest possible file size.