Compress PDF
Reduce a PDF's file size in your browser with adjustable quality and resolution — best for scanned or image-heavy PDFs.
Shrink a PDF's file size in your browser — best for image-heavy or scanned PDFs
How to use
Drop in a PDF, adjust the image quality and resolution to taste, and click compress. The tool rebuilds the document at a smaller size and shows you the before-and-after file sizes so you can see exactly how much you saved before downloading.
It works by rendering each page and re-encoding it, which shrinks scanned and image-heavy PDFs the most. Lower quality and resolution give smaller files; nudge them up if the result looks too soft.
All the processing happens in your browser, so your document is never uploaded — handy for compressing private files to fit an email or upload limit.
Examples
Shrink a scanned PDF under a portal's size cap without leaving your browser.
Reduce a heavy brochure so it sends without bouncing.
Compress a multi-page scan that's far larger than it needs to be.
Frequently asked questions
Why did my text-based PDF barely shrink?
This tool compresses by re-encoding page images, so it helps scanned and image-heavy PDFs most. A PDF that's mostly text is already small and won't shrink much.
Will the text still be selectable?
No. Because pages are rasterised to images, selectable text becomes part of the image. Keep the original if you need the text layer.
Are my files uploaded?
No. Compression runs entirely in your browser, so your document never leaves your device.
How do I get the smallest file?
Lower the quality and resolution sliders. Check the preview sizes and raise them slightly if the output looks too soft.
Related tools
Convert each page of a PDF into a high-resolution JPG or PNG image, then download them — all in your browser, no upload.
Compress JPG, PNG or WebP images to a smaller file size right in your browser, with quality and resize controls. No upload.
Combine several PDFs into one, in any order — processed entirely in your browser.
Remove pages from a PDF or rearrange their order using page thumbnails, then download the edited file. Nothing is uploaded.
Combine images into a single PDF, one image per page.