UnpassHow to Reduce the Size of a Scanned PDF
Open the Compress PDF tool →Scanning creates big files because every page is stored as a full-resolution image. A few scanned pages can be 10–20 MB. Compression brings that down dramatically.
How to compress a scanned PDF
- Open the Compress PDF tool —
- Upload the scanned PDF —
- Choose "Recommended" or "High" — Scanned files compress a lot, so High is often fine and still readable.
- Download —
💡 If you only need a few pages, split the PDF first — fewer pages means an even smaller file.
Ready? Use the Compress PDF tool — free, and your file never leaves your device.
FAQ
Why are scanned PDFs so big?
Each page is a high-resolution image, which is heavy.
How much smaller will it get?
Often 60–85% smaller while staying readable.
Is it private?
Yes — processed on your device.
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