Quick tip: You can check the file size of your new PDF by right-clicking the file and choosing Get Info. How to reduce PDF file size on a Mac computer using compression software.

Check out a few easy ways to reduce PDF file size on a Mac to make it easier to work with. ... Click the document icon next to the Reduce File Size filter to create its copy.

1] Check the Folder’s Size from File Explorer. Let us start by checking the Folder’s Size from File Explorer. The only caveat with this method is that you won’t be able to see folder storage ...

Now, check the size of the new file and compare it with the old one. While testing, a 15.1 KB file became 11.9 KB within moments, which is around a 21% reduction.