Compress a PDF without uploading it
PDFs are exactly the files you shouldn't upload to a random converter site: contracts, invoices, ID scans, medical documents. This compressor never sees your file - your browser opens the PDF locally, redraws each page as an optimized image, and rebuilds the document on your device. Close the tab and nothing remains.
How to shrink a PDF
- Drop your PDF above.
- Pick a quality and resolution. For emailing scans, 96-120 DPI at 60-75% quality typically cuts the size by 70-90%.
- Click Compress PDF and download the result. The before/after size is shown so you can re-try with different settings instantly.
Why are scanned PDFs so huge?
Scanners often save pages as full-resolution, lightly-compressed images - a 10-page scan can easily be 50 MB. Re-encoding those pages at a sensible resolution and modern JPEG quality is exactly what this tool does, which is why the savings are usually dramatic.
FAQ
Does this PDF Compressor upload files to a server?
- No. The entire process - reading, rendering, rebuilding - happens in your browser.
Will the text still be readable?
- Yes, at the default settings text stays crisp. It won't be selectable/copyable in the compressed copy, because pages become optimized images.
Does it work with password-protected PDFs?
- Encrypted PDFs can't be opened without the password - remove protection first, then compress.
Is there a size limit?
- No fixed limit; very large PDFs are limited only by your device's memory.