Secure PDF Compression - 100% Private
Shrink PDF files instantly without uploading them anywhere. Your files stay on your device.
Drop your PDF here
or click to browse (multiple files supported)
By using our service, you agree to our Privacy Policy and Terms of Service
100% Private
Your files never leave your computer - guaranteed privacy
Efficient Processing
No upload needed - compress directly on your device
Professional Quality
Reduce file size while keeping document quality
The Most Secure PDF Compression Tool
Unlike other tools that upload your files to servers, our technology works right on your device.
How It Works
Simply drop your PDF and let our tool compress it right on your device. No uploading to servers means better privacy and no transfer delays.
How to Compress a PDF
Upload Your PDF
Drag and drop your PDF file or click to browse. Files are loaded directly into your browser memory.
Choose Quality
Select a compression preset: Screen (smallest), Ebook (balanced), Printer (high quality), or Prepress (maximum quality).
Download Result
Click compress and download your smaller PDF. The original file is never modified.
Frequently Asked Questions
Is my PDF uploaded to a server?
No. CompressMyPDF uses WebAssembly technology to compress files entirely in your browser. Your PDF never leaves your device, ensuring complete privacy.
What compression quality should I choose?
For email attachments, use Screen (72 DPI). For general use, Ebook (150 DPI) offers the best balance. For printing, choose Printer (300 DPI) or Prepress for professional output.
Is there a file size limit?
There is no hard limit. Compression happens in your browser memory, so very large files (over 100 MB) depend on your device capabilities.