The best OST to PST converter is Softaken OST to PST Converter software. This is the most reliable and most suitable software for converting the OST file safely and exactly PST format. Users can simply install the app on any Windows system. The software converts numerous and large OST files to PST format without any technical problems. This is one of the best and most effective solutions to export OST to PST. The tool offers a free demo version. Users must try the tool.