pdf compress PDF
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Drop a PDF here

or click to choose it · nothing is uploaded, it's compressed in your browser

Medium (110 dpi): a good balance for scans.
Less quality = less size. "Medium" is usually enough.

Compress PDF

Shrink a PDF without uploading it anywhere: the file never leaves your browser, nobody sees it. Ideal for when a form won't let you upload a PDF because it's "too big".

How it works. It turns each page into an image and lowers its resolution and quality. That's why it works great on scanned or image-heavy PDFs — exactly the ones that tend to be too big.

Note: because it rasterizes, the text is no longer selectable. On a text-only PDF, compressing this way doesn't help (it makes it worse): in that case it tells you and won't hand you a file worse than the original.

Built in-house: pdf.js (by Mozilla) only reads the PDF; the compressed PDF is written by our own code. All in your browser.