Your PDF is compressed in your browser and is never uploaded or stored.
How to compress a PDF
- Click the box above, or drag and drop your PDF onto it.
- Choose a compression level.
- Click Compress PDF and wait while each page is processed.
- Check the new size, then click Download.
Which compression level should I choose?
- Strong (low, medium or high): turns every page into a compressed picture. This gives the biggest savings for scanned documents, photos and image-heavy files. Higher compression means a smaller file but a softer picture. Because pages become images, text can no longer be selected, copied or searched.
- Light (lossless): rebuilds the file without unused data and keeps text selectable and sharp. Most files shrink only a little, but nothing is lost.
A PDF that is mostly text is already small, and strong compression can actually make it larger because pages become pictures. If that happens, the tool tells you and does not offer a download, so you can keep your original.
Is it safe and private?
Yes. Your PDF is processed entirely in your web browser on your own device, so it is never uploaded to a server or stored anywhere. The page loads two open-source PDF libraries when it opens, so it needs an internet connection the first time.
Good to know
- Password-protected PDFs cannot be compressed. Remove the password first.
- Strong compression works on files up to 50 MB and 200 pages. For bigger files, use the Light level, or cut the file into parts with our Split PDF tool.
- Links, bookmarks, form fields and document properties are not kept by either level.
- Large files take time because every page is processed on your device, and older phones may struggle. Your original file is never changed.
Need to combine files first? Try our Merge PDF tool.