How to Compress a PDF on Mac

Adobe PDF files are often too big that users end up having trouble sending them via email. Stop stressing yourself and reduce these files on a Mac device without losing their original quality to help you send large PDF files in no time.

How to Compress a PDF on Mac

Mac has incredible built-in features that allow you to manage your PDFs efficiently without having to invest in a third-party application or software. And, compressing PDFs in the Preview app on your Mac is a breeze with the simple steps discussed below.

  • Step 1: Open PDF File


    In the Preview app, open the PDF document that you need to compress. You can drag the file to the PDF element to quickly display it. Otherwise, carry out the usual process of opening through the “File” task pane.

  • Step 2: Click File and Select Optimize PDF


    Go to the “File” menu. From the drop-down list, you need to select “Optimize PDF.” This will take you to the “Options” window for the image quality.

  • Step 3: Set the File Image Quality


    From the “Options” window, you will be presented with several image quality in dots per inch or dpi. The smallest possible file size with low quality is 150 dpi. Choose this only when the print quality is not as important as the file size. However, the most recommended setting is 300 dpi. It is best that you use this to produce a file with decent print quality.

  • Step 4: Save the File


    When you have already figured out the new file size for your document, in reference to the image quality, click “Save As.” Give it a new name and save it in the desired destination folder. You may also proceed to click “Save” under the “File” menu if you no longer have changes to the filename.


What can be done with a PDF file that is too big for an email?

Create a new folder with a recognizable name for your recipient, gather all the large PDF files into this folder, right-click once you have done it to display the drop-down menu, select “Send To,” and finally, click on “Compressed (Zipped) folder.”

How can a PDF file size be reduced for emails sent on a Mac?

Go to the Preview and open the PDF file that needs to be compressed, then click on “File,” select “Export” and remember not to choose “Export as PDF” as you will not be, tap on “Quartz Filter,” and then click on “Reduce File Size.”

How can an extremely large PDF file size be reduced to 1 MB?

Go to “File” in your PDF editor such as Adobe Acrobat, and then click on “Tools,” select “Optimize PDF,” choose a file to compress, then tap on “Reduce File Size,” and pick a compatible file version, rename it, and save.

Can a file be made smaller by zipping?

Yes, zipping compress files without ruining the original quality.

Why is the PDF file so big?

The PDF file might have various fonts embedded and subset within it.