PDF compression is a balance between file size and readability. A stronger compression level may create a smaller file, but it can also reduce image quality or make scanned text harder to read.
Light Compression
Light compression aims to reduce file size while preserving most visual detail. Use it for resumes, forms, contracts, presentations, and files where text clarity is important.
Medium Compression
Medium compression is a practical starting point for many everyday files. It can reduce image-heavy PDFs noticeably while keeping the document readable for normal viewing.
Strong Compression
Strong compression is useful when a strict upload or email limit matters more than perfect image quality. Use it carefully for scanned documents, certificates, or pages with small text.
How To Choose
- Open Compress PDF.
- Create a compressed copy.
- Compare the file size before and after.
- Open the result and inspect text, signatures, QR codes, and images.
- If quality is too low, try a lighter result or reduce pages instead.
Example
A brochure with full-page photos may tolerate stronger compression than a scanned invoice with tiny text. The brochure needs to look good, but the invoice must remain easy to read and verify.
When Compression Is Not Enough
Use Split PDF Pages when the recipient only needs part of the document. Use Delete PDF Pages when old pages, blanks, or duplicates are increasing the file size.
FAQ
Which level is best for email?
Start with medium compression, then check the result. Use stronger compression only if the file is still too large.
Why did my scanned PDF get blurry?
Scanned pages are image-based. Heavy compression can reduce the image quality of the whole page, including text.