PRACTICAL GUIDE
How to compress a scanned PDF
Scanned PDFs are often large because every page contains a high-resolution image. After reducing size, zoom in on text, stamps, signatures, and table figures.
Step-by-step
- Choose the original scanned PDF and try recommended compression first.
- If it is still over the limit, retry strong compression from the original.
- Zoom in on the first page and the page with the smallest text to confirm readability.
Check before using the result
If scans are rotated incorrectly or have many blank pages, edit the PDF first. A cleaner source can make compression more effective.
Open the free tool →Frequently asked questions
What if text becomes blurry?
Retry from the original using recommended or light compression instead of strong compression.
Can I reduce a black-and-white scan?
Yes, but review small text and official stamp details directly.
About this guide
This guide is written for a practical workflow. Keep an original copy of important files and review downloaded output before sharing it with another person or service.
Which scanned page should you check first?
Not every page in a scanned PDF has the same detail. Check the page with the smallest numbers, stamp edges, or the narrowest table column first. If that page remains readable, the rest is usually safe.
- If text becomes unclear, return to the original and use a lighter setting.
- For multi-page documents, check the page with the smallest text, not only page one.
- Keep both the original and compressed copy when resubmission would be difficult.