OST to PST Converter

This tool solves the need to access mailbox data stored in OST files when the original Exchange profile is unavailable or the device is offline. It serves IT professionals, migration specialists, MSPs, and individuals who require mailbox continuity, data recovery, or archival access. Users upload an OST file and receive a PST export that preserves mailbox structure, message metadata, and attachments, enabling import into Outlook or compatible clients. The service is free and online, eliminating the need to install desktop recovery software and supporting quick recoveries and migrations without server access.
Conceptually, the converter reads the OST container on the server, maps folders to a PST container, and reconstructs messages with preserved headers, timestamps, and attachments. The process is deterministic and maintains hierarchy so folder paths remain intact in the PST. Core features include full mailbox export, optional scope controls, and basic integrity checks. Advanced options may allow date-range filtering or selective folder export to reduce PST size. The result is a standard PST compatible with recent Outlook versions and other compliant clients.
Distinct value comes from a no-install workflow, clear outcomes, and emphasis on data integrity. It supports quick migrations, archival, and backup planning for scenarios where direct server access is unavailable. Potential users include IT teams, service providers, and administrators migrating or preserving historical mail. The tool exports only PST data and does not provide password recovery, server access, or non-PST formats.