When Outlook OST files become unavailable due to Exchange removal, system migration, or accidental profile deletion, users often look for ways to convert OST to TXT for universal readability. TXT is a plain-text format that loads instantly across devices, platforms, and applications, making it suitable for compliance checks, audits, legal needs, and investigative content review. However, performing this task manually is neither efficient nor consistent because manual approaches require active Outlook connectivity and fail to handle large mailboxes. With the SysInfo OST to PST Converter, users can extract OST data independently of Outlook and export it to TXT format, preserving folder hierarchy, metadata, timestamps, and header fields. Apart from TXT, the software provides support for PST, MBOX, EML, CSV, and numerous other formats that simplify data portability. Its preview mode assists users in verifying mailbox content before conversion, avoiding errors and maintaining accuracy. This professional approach is ideal for IT administrators, forensic teams, and corporate environments that handle legacy OST files, where access, readability, and data accuracy are essential.