Modern Windows 10 comes with "Print To PDF" printer driver so you can easily open your powerpoint presentation and print to such printer driver and output a corresponding PDF. A lot of our users use our online conversion service when they either don't have MS Powerpoint installed on their machine at the moment, or received PPT, PPTX files on their mobile phone or tablet.
We have a wonderful feature converting PDFs to "catalog" pages, e.g. 2 x 2, 3 x 3, etc. Give it a try.
Use the below form and submit your Powerpoint file. Don't forget to verify your email address is correct so the result PDF will reach you. Your converted PDF will be sent to you as a downloadable link.