Pretty much any other similar program, also FileMaker Pro relational database management system for Microsoft Windows and Mac supports export to PDF format and as such can be used to export certain data from the database as .pdf files. This is essentially what fp3 to pdf conversion represents and it is used for tables and other printable data collections.
Unfortunately, we do not know about any other way to convert fp3 to pdf or about any free online fp3 to pdf converter, so using FileMaker seems like the only choice.
The same goes for FastReport Studio that uses it's own unique .fp3 file (same suffix, different file type) for reports which may be printed as PDF documents.
Updated: March 27, 2017