Reduce the size of your PDF so it is easy to email, upload or store. Choose a compression level and download a lighter PDF — all in your browser.
Note: compression re-renders pages as optimised images, which works best for scanned or image-heavy PDFs. Selectable text may become part of the image.
Large PDFs can be hard to email or upload. Our free compress PDF tool shrinks your file by optimising the images inside it, so you get a smaller document that is quick to share. Choose Recommended for a great balance of size and quality, or Strong when you need the smallest possible file.
It depends on the file. Scanned and image-heavy PDFs often shrink by 40-70%. Simple text PDFs are already small and may shrink less.
Yes, completely free with no watermark and no signup.
Compression optimises images to save space. The Recommended setting keeps documents clear and readable; choose Light for the highest quality.
No. Your PDF is compressed locally in your browser and never sent to a server.
Our free PDF compressor reduces PDF file size so your document is small enough to email or upload. People also search for this as shrink PDF, reduce PDF size, make PDF smaller, or compress PDF for email. It is especially effective on scanned and image-heavy PDFs, and it runs entirely in your browser on Windows, Mac, iPhone and Android — no watermark, no sign-up, and your files never leave your device. Need to combine files first? Try Merge PDF, or export pages with PDF to JPG.