About Compress PDF
Shrink a scan-heavy or image-heavy PDF so it fits under an email attachment limit or uploads faster, without making the text unreadable. Common after scanning a stack of paper documents into one file.
How to compress pdf
- 1Upload the PDF you want to shrink.
- 2Choose a compression level — lighter for near-lossless results, stronger for maximum size reduction.
- 3Click Run Compress PDF.
- 4Download the smaller file and compare it against the original if you're unsure about quality.
Tips
Scanned documents compress much more than text-only PDFs, since most of the size comes from embedded images.
If the result still looks too soft at maximum compression, try a lighter setting — quality and file size are a trade-off.
Compress after merging, not before — merging several already-compressed files rarely saves extra space.
FAQ
Is compressing a PDF free?
Yes, free with no sign-up.
How large a file can I upload?
Up to 100 MB.
Is my document kept private during compression?
It's uploaded over HTTPS, processed, and deleted automatically along with the output within 1 hour.
Can I compress a PDF on my phone?
Yes, it works in any modern mobile browser without installing anything.