You can also Use CubexSoft PST Converter to convert PST to CSV without Outlook. The software is simple to use and enables both technical and non-technical users to effortlessly export multiple Outlook data file to CSV file format. The tool even maintains to keep the data integrity intact while converting PST files to CSV files. You can also download its free demo edition to check its working efficiency and will convert first 25 emails and contacts per PST file to CSV format, as free trial.