How to Compress A PDF on Mac?

Mon. 22 Jun. 20201002.5 mins

If you have a lot of PDF files on your Mac, and they take up a lot of memory, you can compress PDF files on Mac to reduce the file size, which will save space on your Mac computer. In addition, if you want to send PDF files to others by email, but email limits the file size, what do you do? Compressing PDF on Mac will be a good choice, which will help you to share your files more easily. In this article, we'll show you how to compress a PDF on Mac.

How to Compress A PDF on Mac with PDF Reader Pro?

We need tools to help compressing PDF on Mac, both third-party software (PDF Reader Pro) and built-in application (Preview) are valid. But Apple shows the official tips for Mac users that compressing PDF on Mac with Preview may lose files' original quality. PDF Reader Pro is one of the best free PDF compressors on Mac, which enable Mac users to compress PDF on Mac without losing quality. What's more, Preview doesn't allow you to batch compress PDF, PDF Reader Pro works well on that.

Step 1. Click "Free Download" to download and install PDF Reader Pro on your Mac.

Step 2. Launch PDF Reader Pro, and find "Compress" in "Advanced Editing Tools".

compress pdf on mac with pdf reader pro

You can also open your PDF file on PDF Reader Pro, and click "Editor", then choose "Compress" to compress your PDF on Mac.

compress pdf on mac with pdf reader pro


Step 3. Select your PDF file and click "Open".


compress pdf on mac with pdf reader pro

Step 4. Choose the "Optimization Options", and click "Compress". There are various options open to you, Large file size, Medium file size, Small file size, Minimum file size or other, you can select a target input.

compress pdf on mac with pdf reader pro

How to Batch Compress PDF on Mac with PDF Reader Pro?

If you want to batch compress PDF on Mac, PDF Reader Pro also allows you to do that.

Step 1. Launch PDF Reader Pro, and find "Compress" in "Advanced Editing Tools". You can also open your PDF file on PDF Reader Pro, and click "Editor", then choose "Compress" to compress your PDF on Mac.

Step 2. Select any file you want to compress and click "Open".

Step 3. Click "Batch", you will go to the batch compressing PDF on Mac.

batch compress pdf on mac with pdf reader pro

Step 4. Click "Add Files" in the top-right corner, you can add all of the PDF files you want to compress. And you can drag your PDF files and drop them to PDF Reader Pro. If you regret adding a file or more, you can select one or more and click "Remove", and you can also click "Remove All" to give up batch compress.

batch compress pdf on mac with pdf reader pro

Step 5. Each PDF file can be individually selected for compression rate. Before compressing, you can set optimization options for your PDF files.

batch compress pdf on mac with pdf reader pro

Step 6. Click the "Output Folder" to select the storage path, and click "Compress", you will get all compressed files. And your Mac storage will be released.

batch compress pdf on mac with pdf reader pro

How to Compress A PDF on Mac with Preview?

If you don't install PDF Reader Pro on your Mac, you can also use Preview to compress PDF on Mac to save storage space. But it's worth noting that the quality may be lower than its original quality after compression. And you can’t batch compress PDF on Mac with Preview.

Step 1. Open your PDF file in Preview.

Step 2. Click "File" on the top main menu bar and select "Export...".

compress pdf on mac with preview


Step 3. Click the "Quartz Filter" pop-up menu, then choose "Reduced File Size."


compress pdf on mac with preview

Actually, PDF Reader Pro is an all-in-one PDF software which can let you view, edit, markup, convert, create, print, protect and share PDF files on Mac. Click the "Free Download" button to try its features for free, you will get a complete PDF solution.


Get Started with PDF Reader Pro Today!