Compress PDF

A PDF that's too large to email, too slow to upload, or rejected by a portal's file size limit is a frustratingly common problem — and it's almost always caused by high-resolution images embedded at print quality even when the document will only ever be viewed on a screen. ConvertEase's Compress PDF tool intelligently reduces file size while keeping your document clearly readable, often shrinking files by 50–80% for image-heavy PDFs.

This compression runs through CloudConvert's optimization engine, which performs several operations simultaneously: downsampling embedded images to screen-appropriate resolution, re-encoding images with more efficient compression algorithms, subsetting embedded fonts to include only the characters actually used in the document, and cleaning out unnecessary metadata, revision history, and thumbnail caches that accumulate in PDFs edited multiple times in desktop software.

The amount of size reduction you'll see depends heavily on what's inside your specific PDF. Scanned documents and photo-heavy presentations typically see the largest reduction — frequently 60–80% smaller — because scanned images usually carry far more resolution than needed for screen viewing. Text-only documents with no images see more modest reductions, typically 10–20%, since there's simply less excess data to optimize away in the first place.

ConvertEase offers this compression completely free, with no limit on file size beyond the standard 200MB cap that applies across all our tools, no signup wall, and no quality-crippling "free tier" restrictions that some competitors use to push you toward a paid subscription. Your file is processed over an encrypted connection and automatically deleted from CloudConvert's servers within 24 hours of the job completing. We always recommend keeping your original, uncompressed PDF as a backup — compression is a one-way process, and any detail discarded during optimization cannot be recovered afterward.