Converting emails from OST to PST format can be a bit tricky, as there is no simple and free solution available for it. However, we have a quick and reliable method to help you with this task. We introduce a tool that is easy to use, works without errors, and supports Windows OS and Outlook editions. All you need to do is download and install the tool on your system. The tool we recommend is called OST to PST Converter. It is the best choice for complete data conversion. It can quickly convert OST files to PST format without losing the original formatting and properties of your email items. This software works as a standalone program, making the conversion process smooth and hassle-free.

Use OST To PST Converter is the most secure and powerful tool that converts OST files to PST. The utility is fully loaded with highly advanced features considering the requirements of high-tech users. Moreover, with this tool's help, you can convert OST files to different files or formats and several email clients. It has an impressive graphical user interface. Additionally, it supports all versions of the Windows operating system. You can try the trial versions of the software to analyze the performance. 

However, if you want to open your OST file without Outlook, here is the most informative article: Open OST File Without Outlook. This article will provide effective solutions to help accomplish the process.