On the internet, size matters. If you've ever had to send PDF files to a friend or colleague, or if you’re running a business, it's quite likely that ...

Finding it difficult to store or share large PDFs on your Mac? Check out a few easy ways to reduce PDF file size on a Mac to make it easier to work with.

Using PrimoPDF to reduce the size of a PDF that's already at low resolution will not downsize the PDF. Use another downsizing resource, such as the Neevia website, or Acrobat.

While Adobe Acrobat DC is the best way to compress PDF files, the compression feature is only available in the paid version of the software.

How to reduce PDF file size on a Mac computer with Preview 1. Open the PDF — if Preview isn't your default app, right click the PDF, then select Open with followed by Preview.