About Compress PDF
Email systems and upload forms often reject PDFs that are a few megabytes too large. Compressing a PDF shrinks it - mainly by optimizing the images inside - so it fits the limit while staying readable.
Upload your PDF and let the tool re-optimize its contents. Scanned documents and image-heavy files usually shrink the most, because their photos and scans carry the bulk of the size. Text-only PDFs are already compact, so expect smaller gains there.
Use it to get a contract under an email limit, to speed up a download on your website, or to archive a stack of scans without filling your drive. Keep the original if you need maximum print quality, since compression trades some image fidelity for size.

