Best PDF compressor software for mac for reducing PDF file size?

So you're checking out pdf-fs- reducer as a potential best PDF reducing software for mac? Honestly, it's a pretty clever little tool that fits the "obscure but free" brief perfectly. It's not a fancy app with a GUI; it's a command-line tool that runs in your terminal and uses the power of Ghost script to shrink your files.

Think of pdf-fs-reducer as a smart middleman. You point it at your PDF, tell it how small you want it, and it calls up Ghost script to do the heavy lifting of downsampling images and compressing the file. Since it uses Ghost script under the hood, the results are actually quite good — it's a reliable engine.

Before you can use it, you need to have Ghost script installed on your Mac. The easiest way is using Homebrew :

bash

brew install ghost script

Once that's done, you don't even need to install pdf-fs-reducer permanently. You can just run it on the fly using npx (which comes with Node.js). If you're not a Node.js user, this adds a step, but the tool itself is as free as it gets.

Open your Terminal and navigate to where your PDF lives. Then, run a command like this:

bash

npx pdf-fs-reducer my-huge-file. pdf

It will create a new file called my-huge-file.reduced.pdf right next to the original. It uses the ebook preset by default, which gives you a nice balance between quality and size.

If you want even smaller files, you can crank it up. For example, the screen preset goes for the smallest possible size (around 72 DPI), perfect for just viewing on a screen:

bash

npx pdf-fs-reducer my-huge-file. pdf --preset screen

If you're comfortable with the terminal and want something truly free and privacy-focused, pdf-fs-reducer is a solid contender for the best PDF reducing software for mac that you might not have heard of. It's fast, effective, and gives you real control over the results.