Academics, students, and even our offices nowadays use the Portable Document Format (PDF). As these files are being created some people may not put its size into considerations. Some could be large and take up too much storage space. Large PDF files are also clog when you want to upload them to websites. To make it easier to attach and send files. Therefore there is a need to reduce the file size of your PDF files. In this article you will learn how to compress PDF in Preview on Mac OS X.

Part 1. Comparison of PDF Compression Function
Part 2. How to Compress PDF with Preview or Preview Alternative

Part 1Preview vs PDFelement in PDF Compression

Items
Flexible Compression Rates	PDFelement offers different compression rates, you can choose an offered rate according to your needs.	No compression rate for you to choose.
Preview Compression Results	Preview the file quality before perform compression.	No preview function available.
User-friendly Interface
Running Speed
Compatibility	Work well with Windows, Mac and iOS

"Thoughtfully designed and very capable PDF editor."

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Part 2How to Compress PDF with or without Preview on Mac

: 1. Open PDF with Preview on your Mac. Then click on the "File" menu and click "Open" to upload your PDF file.

2. Once the PDF file is on Preview, click on "File" and select "Export".

3. On this window, scroll down and click on "Quartz Filter" and select "Reduce Size file". Then click on "Save". You have compressed your PDF.

: Step 1. Open PDF with PDFelement
First thing to do is to open Wondeshare PDFelement. On the Home window you will see the "Open File" button at the bottom left. Click on it to upload your large PDF from your local folder.

Step 2. Optimize to Reduce File Size
Go to "File" and click on "Optimize PDF" option. There are different compression options. You can choose one to preview the result before compressing it. Click "Save As" and then the program will then resize your PDF immediately. This software is smart since it displays the original file size and the size of the reduced file. After that click on "Save" to make the changes.