Which compression mode should I use?
Use Preserve text and links for digital documents where selection, links, forms, annotations, or accessibility matter. Use Raster image compression for scans and image-heavy PDFs where smaller size matters more than interactive content.
Can I compress only scanned pages?
Yes. Choose Only selected pages and enter page numbers or ranges. Selected pages are flattened into JPEG images; other pages are copied without intentional rasterization.
Will every PDF become smaller?
No. Already optimized files, text-only documents, and high-resolution settings can produce a larger result. The result is retained temporarily and shows the comparison before you decide to download.
Is the quality sample the full-resolution output?
No. It is a reduced-size preview for comparing JPEG artifacts and grayscale appearance. The final PDF uses your selected DPI, subject to safe browser canvas limits.