Compress Scanned PDF
Free, private, in-browser. No upload, no sign-up, no watermark.
Scanned documents are huge because every page is stored as a high-resolution image — a few pages can easily reach 10–50MB. This tool re-encodes those page images at a lower, still-readable resolution and quality, dramatically cutting the size. It is built specifically for scans and runs entirely in your browser, so confidential contracts and IDs are never uploaded. Where a fixed-size compressor forces every file to one rigid number, this mode focuses on squeezing the bulky image data that makes scans so large, which is why reductions of eighty to ninety-five percent are common. That makes it ideal for emailing a signed agreement, attaching a certificate to an application, or simply archiving paperwork without filling your drive. You never need to register or install anything, there is no watermark on the output, and the entire process stays on your own device for complete privacy.
How it works
-
Select your PDF
Choose the file you want to shrink. It loads directly in your browser.
-
Compress in-browser
We lower image resolution and quality until it hits the target size.
-
Download the result
Save the smaller PDF. Nothing is ever uploaded to a server.
FAQ
How much smaller will my scan get?
Scanned PDFs often shrink by 80–95%, since most of their size is high-resolution images that compress well.
Will the scan still be readable?
Yes. The tool balances size and clarity to keep text legible. You can re-run if you need it smaller.
Is it private enough for legal documents?
Yes. Files are processed only on your device and are never uploaded or stored.
Learn more: How to compress a PDF for an online form