PDF Tool
Compress PDF
Reduce PDF file size without losing quality
Drop a PDF here or browse
One PDF · 10 MB max · PDF only
How to Compress PDF
1
Upload
Select or drag and drop your PDF file(s) into the upload area above.
2
Process
Click the process button. Our server handles your file instantly and securely.
3
Download
Download your processed file. Files are available for 1 hour before auto-deletion.
Why Use PaperFlow Compress PDF
✓
Completely Free
No subscription, no hidden fees. Use the tool as many times as you need.
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No Registration Required
Start using the tool immediately without creating an account.
✓
Bank-Level Security
All files are encrypted in transit and deleted automatically after processing.
✓
High Quality Output
Our algorithms maintain original document quality and formatting.
Frequently Asked Questions
How does Compress PDF reduce file size?
We re-encode and downsample images and optimize the PDF structure using industry-standard compression, letting you trade a little image quality for a much smaller file.
Can I control the compression level?
Yes. Choose Low (best quality), Recommended (balanced), or High (smallest file) depending on your needs.
Will quality drop?
Higher compression reduces image resolution. For text-heavy PDFs the difference is barely noticeable; for image-heavy PDFs, use a lower level to preserve quality.
What if my PDF is already optimized?
If we cannot make it smaller without hurting quality, we return your original file unchanged so you never get a larger file.
Is it free?
Yes, with daily limits. Free/guest outputs include a watermark; upgrade to Pro for clean output and higher limits.