Compress PDF

Shrink a merged PDF for email and uploads.

Upload the PDF.
It's re-saved with optimised compression.
Download the smaller file.

A merged document can get large. This tool re-saves your PDF with optimised, deflated content to bring the size down for email and uploads, while keeping it fully intact.

Guides about Compress PDF

Merge & compress Merge Then Compress PDF: One Small, Sendable File Merged PDF too big to send? Learn the merge-then-compress routine: why order matters, how much you can shrink a file, and how to keep quality while saving space. 5 min read

More mergepdf tools

Merge PDF Combine multiple PDFs into one document, in the order you choose — free, online, no watermark. Split PDF Break a PDF into single-page files. Rotate PDF Turn sideways pages the right way up before or after merging.

Frequently asked questions

Still selectable?

Yes — text and structure are preserved.