Answering âHow do I convert PDF files to MP3 files?â You canât convert a PDF to an MP3 and retain any meaningful content. A PDFâs contents are mostly text and graphics that are used to create a formatted document. An MP3 file contains digitized audio data. This is kind of like asking how can you take the script of a play and generate a video file of the play. It doesnât work that way. I hope this makes sense and is helpful!