Compress PDF reduces a document's file size by downsampling the images inside it, which is especially effective for scanned or image-heavy PDFs. Choose a compression level and see how much smaller the file becomes — all processed locally in your browser.
Drop the file in; its size and page count are shown.
Choose Light, Recommended or Strong depending on how much you want to shrink it.
Export to rebuild the PDF at a smaller size and see the savings.
Text-only PDFs have little to compress. The biggest savings come from documents full of photos or scans.
This method rasterises pages to downsample images, so selectable text becomes part of the page image.
For maximum reduction on large documents, a server-side Ghostscript pass is available on Premium.
No. This tool runs entirely in your browser — your file is processed on your own device and never leaves it. The only network request is an anonymous usage counter.