To convert MBOX emails to PDF using the SysInfo MBOX Converter Tool, just follow these basic steps. First, download and install the software on your computer. Open it and click Add Files to choose the MBOX file you want to convert. The tool will scan the file and show you a preview of your emails. Next, select PDF as the format you want to save the emails in. You can also choose to convert only certain emails using the Date Filter, or skip repeated emails with the Remove Duplicates option. Once you're ready, click the Convert button. The software will quickly save your MBOX emails as PDF files in the location you pick.