How to Use the Client-Side PDF Compressor & DPI Optimizer
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1
Upload your heavy or multi-page PDF document into the dropzone.
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2
Select your target compression profile (High Quality, Balanced, Extreme Compression) or adjust DPI & quality sliders.
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3
Click "Compress PDF" to render and re-encode pages locally.
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4
Compare original vs compressed size and download the optimized PDF instantly.
Practical Example & Use Case
Common Real-World Scenario
Compressing a 15MB scanned contract with heavy photos down to 1.2MB for job portal or email attachment limits.
Technical Notes & Limitations
Browser Engine Architecture
Scanned or image-rich PDFs yield the highest compression ratio. Pure vector text PDFs already optimized may show minimal size reductions.
Frequently Asked Questions
Are my confidential documents uploaded to any server?
Never. Processing is 100% client-side using PDF.js and HTML5 Canvas inside your browser sandbox.
Can I target a specific file size like 100 KB?
Yes, choose the "Target Size" or "Extreme" preset which adjusts page render scale and JPEG quality factor dynamically.