PDFOptim

I have 200 MB notebooks from good notes, this thing could only get it down to 50 MB, which is great but not good enough. The algorithm clearly only messes with the photos in the PDF, but as GoodNotes seems to save the handwriting as a really high resolution background for the PDF, the algorithm doesn’t optimize it at all. At 1ppi, which is an ultra low setting the images become indecipherable, but the handwriting is crystal clear. I’m going to get a refund.

Very easy to use and it works!

It’s amazing.

Making PDF files smaller is probably the one thing that about everybody needs at some point. There are hundreds of apps that will mark up, save, reorder pages and stuff with PDF files (Good Reader is my personal favorite) but none of them will help you get a a 30mb PDF down to email size. This does it without an annoying subscription. Simple, affordable, worth every penny. I squished down a 25mb PDF to 3mb and couldn’t even tell the loss in quality. A life saver.

This does an amazing job in my early usage at reducing PDF size while preserving decent quality. Thanks! It’s a bit disappointing that it does not support iOS shortcuts, and that you need to buy another copy if you want to use it on macOS. That makes it a bit pricey for a single-purpose utility app.