OST To PST Converter is the most secure and powerful tool that is capable of converting OST files to PST format. It has a simple and user-friendly interface that is compatible with technical and non-technical users. Moreover, it also converts OST files to multiple file formats and several email clients. Additionally, it preserves the internal folder hierarchy throughout the conversion process. You can try the full-featured trial versions of the software to analyze the performance.
However, if you want to open your OST files without Outlook then here is the best article for your
Open OST Files. This article will provide the most effective solution to accomplish the process.