Use the SysInfoTools OST to PST Converter to convert OST files to JSON file format it is a powerful and dependable tool designed to convert OST files to Outlook PST format with complete data integrity and precision. It supports the conversion of OST files into various formats, such as PST, MBOX, EML, EMLX, HTML, CSV, and MHTML, providing flexibility to suit different user needs. The software allows users to select and convert both individual and multiple OST files at once. Additionally, it facilitates the seamless export of OST data—such as emails, contacts, calendars, tasks, and notes—to over 15 cloud-based and web email clients, including Office 365, Gmail, Thunderbird, and Yahoo Mail, ensuring smooth and efficient data migration.

Step 1: Launch the OST to PST Converter tool and browse to locate the OST files.
Step 2: Select and add the OST files you wish to convert to PST.
Step 3: Preview the details of the selected OST files and click Next.

Step 4: From the drop-down list, choose the PST format as the desired output.

Step 5: Select any additional options provided for a seamless conversion process.

Step 6: Click Convert to begin the OST to PST conversion.