On a Apple computer, the “Print” function of the “Preview” app includes the choice for printing the open file to PDF. This works for converting various picture formats to PDF. In fact, any open printable file can be printed as a PDF. If your objective is to make a PDF into a searchable PDF, Word To Pdf Conversion works. There are some “free” software listings on the Internet, but I can’t suggest one or another. On a Apple computer, if you just want to merge two or more PDF files, click theft-most icon above the main PDF window. There’s dropdown with several choices. The second is to open “thumbnails”. Click it; you get thumbnails of every slide in your PDF file. Do this with both of the files you want to merge. Drag thumbnails from one file to the other - in the order you choose. You now have the merged file. (This is probably identical in the Windows operating system.) HTH
Orné PDF Converter is a small but useful package that converts Word and PDF files, too. It can also use text from audio files to provide text-to-speech conversion. If you want to convert a file in the original format of Word, it's called Word to PDF. But what if it's in PDF or PDA format, or you want to use it as PDF or even as a slide show… the software is very flexible as the name suggests but also can do everything. When you run the application, use the options interface to specify input files, output format, output folder, and so on. If you want to convert only Microsoft Word files and no other, use the convert button. The user interface is very intuitive, too. You can drag and drop folders and files on the table to rearrange them and even create several tables. In addition, you can.