Compress a Scanned PDF Without Losing the Important Details
Keep the original scan, try a compression level, and inspect the downloaded pages. A smaller file is useful only if the required details remain readable.
Choose the details you must preserve
Before processing, find pages with small text, document numbers, handwriting, or faint stamps. These are useful places to compare the original with the output.
Some scanned pages contain images that the current PDF compressor cannot further reduce. A scan does not automatically mean a large saving is possible.
Try a compression level
Open the PDF compressor and add the original. Low does not re-encode embedded images. Other levels can lower image quality or resolution.
Choose a level based on the details the recipient needs, rather than a promised reduction percentage.
Inspect the downloaded PDF
Check the number and direction of pages, then compare the important regions. Review small writing, signatures, and stamps. Do not treat a successful download or a smaller size as proof that the document is acceptable.
When to step back
If important details become hard to read, use a weaker level or the original. To compare another level in the current tool, reset or remove the completed entry and select the original again.
If the source itself is unreadable, consider rescanning. Current compression does not provide OCR, shadow removal, page cleanup, or detail recovery.
Use the relevant tool
Open PDF compressor when you are ready to follow the steps. Browse more file guides for a different problem.