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How to Reduce PDF File Size on Mac for Emailing

| Posted by Megan Charles to Follow @
"I have a PDF that I’m trying to send to my friend via email. It’s a pretty large file at 264 MB which is too large for an email attachment. How can I compress a PDF file to be small enough for email attachment?" 

Well, the size of the PDF file increases and causes problem while sending as an attachment mostly due to embedded images in the PDF file. So before sending such type of PDF files as an email attachment you need to shrink or compress the PDF file. Here in this article, I’ll introduce you two methods to shrink the size of pictures in PDF files so as to avoid exceeding the maximum message size limits associated with most e-mail accounts.

Method 1: Compress a PDF file on Mac with Preview

Preview is a free mac program provided by Apple to manage PDF and image files. It is built in a feature to reduce PDF file size.




  1. Open the PDF file with Preview application.
  2. Choose “File” at the top of the screen and then click on “Export”.reduce pdf file size on mac with preview 01
  3. In the “Save As” pop-up windows, find the “Quartz Filter” and select “Reduce File Size”.reduce pdf file size with mac preview
  4. The last step is to click on the “Save” to reduce the PDF file size.

Method 2: Compress a PDF file on Mac with Enolsoft

Enolsoft PDF Compressor for mac allows users to reduce pdf file size on mac without losing original file quality. It provides 4 compression mode to customize the file resizing. Batch reducing is also supported.



The Real Process:

  1. Download PDF Compressor for Mac from its official website or by click here.
    Free Trial
  2. Launch the app, drag-n-drop the PDF files you’d like to compress to its interface.pdf compressor for mac
  3. Select the PDF compression modes to choose the PDF compressibility that matches your requirements.pdf compressor for mac
  4. The last step is to click the button “Compress” to start compressing PDF files on Mac.

Tips: If your PDF file is an encrypted PDF file, you need to enter the PDF password before you can compress it.


As the Mac built-in app, Preview makes it easier to reduce PDF file size with the “Save As” function. If you have only a few PDF files to be compressed and didn’t care much about the PDF compression quality, Preview maybe the best choice for you. But if you have a bunch of PDF file to be compressed and the compression quality is very important for you, the PDF Compressor for Mac maybe better than Preview.