Here is a visual comparison of the same PDF before and after optimization. Can you imagine how bad they are after our manipulations? Almost 70 times smaller size. I was amazed by the results! How is this possible? The thing is that Preview increased compression rate and scaled down all the images stored inside the document. Now go to the saved file and check the size. Now click on Quartz Filter and select Reduce File Size option. Set new file name for your optimized file. Go to File → Export.Įxport As window appears. Double click on your PDF to open it using Preview. The quality will be horrible, but let's try it. Let's optimize our file using build-in preset. Let's make it possible to send it via email. Right click on the file, then select Get Info from context menu. Also, I checked the file size before optimization. I made separate folder for my PDF experiments. Compare reduced PDF to the original one.If you are an expert user, go to the last part of this page with a download link and short instruction. This tutorial is for very beginners and includes step by step instruction for each step. The good news is that macOS is a pretty flexible system and it allows to create your own presets for saving PDF files.
Preview allows to save opened documents in different formats and even to optimize PDF files, but the problem is that the quality of the output PDF is pretty poor.
We will use build-in application called Preview, which is used for viewing PDF documents on macOS. The great thing is that you don't need to install any additional software. If there is only text, that is not going to work.
In this short guide I will show you how to dramatically decrease PDF file size in case there are a lot of photos inside.