doPDF is a free program to convert printable files to PDF format. The developer also offers a paid version called novaPDF which has more features and better performance.
The program (doPDF) has a limited number of features and you can choose between different levels of quality for the final PDF file (high, medium, smallest file).
Is good at speed, it will process the file faster than other similar programs.
Is weak and the final PDF will not have the smallest size.
This program will produce PDFs with a good speed, but with a bigger file size than its competitors. Good to use only if you don't need any advanced option.