Compress

Compress shrinks a large PDF's file size — handy when a file is over a portal's limit or too big to email.

How to do it

1. In the Organize tools, choose Compress....
2. Set a Quality from 1 to 9, and turn on Grayscale if color isn't needed.
3. Click Compress PDF.

RaioPDF shows the before-and-after size so you can see how much it saved.

What to know

• It runs on your machine, using the built-in engine — nothing is uploaded.
• Lower quality makes a smaller file but a less sharp one; higher quality keeps it crisp but larger. Try a middle setting first.
• It changes the open document. Save to keep it — use Save As to keep the original.