Lightweight PDF is a free PDF compressor app for MAC. This is an extremely simple app for macOS that you can use. Here it compresses a PDF file you give to it in a few seconds. All you have to do is drag drop a PDF and it will compress it. It saves changes to the same file so you may want to backup the original file if you are going to use this app. It can help you reduce size of a PDF up to 50% or more. However, it only works with scanned PDFs since they are generally large in size.
Scanned PDFs are composed of images and that is why they have large sizes as compared to normal PDFs. And if you want to optimize them then this simple app will help you. Few months ago I wrote about some image optimizer apps for macOS and now I am mentioning this PDF compressor app. Install it from the Apple App Store and then use it anytime you want. The minimal interface of this app is very much handy in compressing the scanned PDFs.
Using this Free PDF Compressor App for MAC:
Use this link to go to the homepage of this app and from there can go to the app store page of the app. Install this app from the store and then wait for the installation process to begin. After installation, it will appear in the Launchpad.
Now, just open the app and then its interface will open up. There is nothing on its interface. You just have to drop a PDF file on it to compress it. Or, you can click in the middle of its interface and then select a file manually from any location on your PC. After that, it will automatically compress the file for you.
The above screenshot will tell you how this app works to compress PDF files in your MBPs and iMAC. After the compression process, it even tells you to how much extent it compressed your PDF file. Now, you can use this in the same way every time you feel need to compress a scanned PDF file.
If you often work with scanned PDF files then you should have this app with you. With the help of this app, you can save a lot of space on disk and optimize files. Its drag-drop functionality is what I liked the most. Just drop a file on its interface to compress it. If you are looking for a free MAC app for optimizing PDF files then Lightweight PDF is a very good option.