
It also includes other useful features, such as the ability to reduce the quality (and thus the size) of documents like PDFs.

Preview is macOS’ built-in tool for viewing document and image files. The easiest way to compress a PDF file on a Mac is to use the Preview app. How to Reduce PDF File Size on a Mac Using Preview

If you want to compress a PDF on Mac, follow the steps below. There are a few easy methods for reducing PDF file sizes on a Mac, including built-in and third-party options. The files and/or folders will be extracted to the same location as the archive.If you’re struggling to send a large PDF file, you might need to consider reducing its size. Unzipping a compressed archive is as easy as double-clicking on the zip file. If you compressed more than one file or folder, the zip archive will be named "Archive.zip" by default. If you compressed a single file, the zip archive takes the same name and adds a zip extension.

Right-click (or Control-click) on the file or folder you want to compress.

