Compress PDF
Make a PDF smaller. Best for scanned or image-heavy documents. Everything runs in your browser — your file never leaves your device.
How to compress a PDF
- Choose a PDF file.
- Pick a compression level (start with Recommended).
- Press Compress PDF — the smaller file downloads automatically.
How does it work?
robinpdf re-renders each page as an optimized image and rebuilds the PDF, which dramatically shrinks scanned documents and image-heavy files. Because pages become images, selectable text becomes part of the picture — for purely text PDFs that are already small, compression may not help.
Is it private?
Yes. The whole process happens inside your browser. Your PDF is never uploaded to any server.