Compress a scanned PDF
Cut the size of an image-heavy scan, privately.
Scanned PDFs are large because every page is an image. That is exactly where compression helps most. This tool opens on Strong quality, which suits image-heavy scans, and does the work on your device so the scan is never uploaded.
How to compress a scanned PDF
- 1
Add your scan
Drop in the scanned PDF you want to shrink.
- 2
Use Strong quality
Strong is preselected for scans; switch to a target size if you have a specific cap.
- 3
Compress and download
Save the smaller PDF, built locally.
Why compress scans on your device
Scanned documents are often IDs, contracts or records. Compressing them locally means the images are never uploaded to a compression service, so no copy is left on someone else’s server.
Frequently asked questions
Why are my scans so large?+
Each page is stored as a high-resolution image, which is far bigger than text. Compression re-encodes those images at a smaller size.
Will the text stay readable?+
Strong quality is tuned to keep scanned text legible while cutting size. Check the result and ease off if any page looks soft.
Is my scan uploaded?+
No. It is compressed in your browser and never sent to a server.
Is it free?+
Yes, with no sign-up.