PDF Compressor
PDF Compressor — right in your browser, nothing uploaded.
Drag & drop your PDF here, or click to choose. Everything runs in your browser — nothing is uploaded.
This free PDF compressor re-renders each page at a resolution and quality you choose, then rebuilds the document — which is what actually shrinks a heavy, image-laden or scanned PDF. You control the trade-off with two simple controls, and the tool reports exactly how much smaller the result is. Everything runs in your browser, so the file is never uploaded.
Frequently Asked Questions
How do I use the PDF Compressor tool?
Drop your file onto the box above (or click to choose), set any options you need, then press the button and the finished file downloads immediately. Nothing is uploaded and there is no signup or watermark.
Is my PDF uploaded anywhere?
No. The file is opened and processed directly in your browser using JavaScript, and never leaves your device — nothing is sent to a server at any point. That is what makes it safe for contracts, invoices, medical records and other confidential documents, and it is why the tool still works with your network disconnected.
How much smaller will my PDF get?
It depends entirely on what is inside. Scanned and image-heavy documents often shrink dramatically, while a text-only PDF is already about as small as it can get — and for those the tool tells you so and gives you nothing to download, rather than handing back a file that is bigger than the one you started with. Lower the resolution or quality for a smaller file; raise them if text starts to look soft.
Is there a file size or page limit?
There is no limit imposed by us, because nothing is uploaded — the only real constraint is your device’s memory. Documents of a few hundred pages are fine on a normal computer; very large scanned files are more comfortable on a desktop browser than on a phone.
Does it work on Mac, Windows, iPhone and Android?
Yes. It runs in any modern browser on Windows, Mac, Linux, iPhone and Android with nothing to install and no account needed. Once the page has loaded it keeps working offline, so you can use it on a plane or a locked-down network.