In the last few months, there has been a surge of requests on the poor server behind invert-pdf.club (often exceeding the 16 simultaneous requests!). On some occasions, I have seen the load reach the 20K files mark in a single week. This unexpected interest has led to slowdowns since the current server can no longer handle all the requests at peak times. Contributions to this project will allow me to provide adequate hosting for the service and keep it online. Thanks for all your support!