How to compress a PDF on a Mac

Written by rose medlock
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How to compress a PDF on a Mac
A sample icon for the file that needs to be compressed.

You may need to e-mail a PDF to someone, but if the file size is too large, every time you click "Send," you may receive an error message or an e-mail bounceback announcing that your file was undeliverable. If you are using a Mac, you can compress the size of your PDF file in a few simple steps, enabling you to successfully send the document.

Skill level:


  1. 1

    Find the PDF file you would like to compress. Open it with the Preview application.

  2. 2

    Choose "File" at the top of your screen, then click "Open."

  3. 3

    Choose "File" and then "Save As" and select "Reduce File Size" from the pop-up menu. Provide a new file name and location for your compressed PDF file.

  4. 4

    Click "Save." Your PDF file is now compressed.

Tips and warnings

  • If you'd like to check the size of your PDF after following the steps to compress it, simply click the PDF's icon and hold down the "Command-I" keys at the same time. A window will appear with details about your file. Under "General," there is a row labelled "Size."

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