compress PDF online
https://wiki-view.win/index.php/Why_You_Need_an_Online_QR_Code_Generator_for_Modern_Business
I needed to send a large PDF by email last week, so I tried compressing it online instead of using expensive software. The tool reduced my 50-page document from 15MB to just under 5MB with barely any loss in quality. It was a simple drag-and-drop process that took about ten seconds.