Local Browser Processing
Ghostscript WebAssembly runs on your device, so standard PDFs are not sent to a CompressMyPDF server.
Compress a PDF Without Uploading It
Reduce PDF file size locally in your browser. Standard files stay on your device and no account is required.
Choose PDF files
or drop them here · multiple files supported
PDF≤ 500 MB
Processed locally · No file upload · No sign-up
By using our service, you agree to our Privacy Policy and Terms of Service
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
- 1
Upload Your PDF
Drag and drop your PDF file or click to browse. Files are loaded directly into your browser memory.
- 2
Choose Quality
Select a compression preset: Screen (smallest), Ebook (balanced), Printer (high quality), or Prepress (maximum quality).
- 3
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 in the standard workflow. CompressMyPDF uses WebAssembly to compress the file in your browser. The optional Google Drive workflow is a separate, explicit exception.
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.