Compress PDF
Compress PDF files online for free to reduce file size. Shrink large, scanned or image-heavy PDFs in your browser and see the size saved — nothing uploaded.
Drop a PDF here, or click to chooseChoose a PDF. Works best on scanned or image-heavy documents.
Frequently asked questions
- How does the compression work?
- Each page is re-rendered as an optimised JPEG image and rebuilt into a new PDF. You pick a quality level and see the before and after size, so you can balance size against sharpness.
- Why does it work best on scanned documents?
- Because pages are turned into images, selectable text becomes part of the picture. That gives big savings on scans and image-heavy PDFs, but plain-text PDFs may not shrink much and will lose selectable text.
- Is my PDF uploaded to a server?
- No. Compression happens entirely in your browser — your file never leaves your device.