Free Private & Secure PDF Compression
100% browser-local processing. No uploads, no storage, no tracking.
Note: Pure image/scanned documents often show 0% reduction β their embedded photos are already compressed at capture. For very large or scanned documents, desktop tools deliver faster, better results.
Need unlimited batches & bulk ZIP exports? Join our Pro waitlist for early access once checkout launches.
Why Local PDF Compression Matters
Most online PDF compressors work by uploading your file to a remote server, processing it, and sending back the result. This means your documents β which may contain contracts, financial records, medical information, or personal data β are transmitted across the internet and stored on third-party servers, even if only temporarily.
PrivacyPDF takes a different approach. All compression happens directly in your browser using JavaScript libraries like pdf.js, pdf-lib, and JSZip. Your PDF never leaves your device. There is no server to hack, no database to breach, no log file to subpoena. When you close the tab, the file is gone from memory.
This is not just a privacy feature β it is faster too. Without the upload-download cycle, compression begins instantly and completes in seconds, even on slower connections. Your files stay yours, from start to finish.
How It Works
- Drop your PDF onto the upload area or click to select. Files are read locally β nothing is transmitted.
- Choose a mode: Light (best quality), Balanced (recommended), or Extreme (smallest size). Each mode uses different image resampling and compression thresholds.
- Compress β processing runs in your browser. Progress is shown in real time.
- Download the compressed PDF individually or as a batch ZIP. No account, no email, no waiting.