Stellar Converter for OST review
A focused Windows tool for OST conversion, recovery, and mailbox export.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Stellar Converter for OST is desktop software for Outlook users, IT administrators, and organizations recovering or migrating mailbox data. It converts inaccessible, orphaned, encrypted, or oversized OST files and extracts emails, attachments, contacts, calendars, tasks, notes, and journals. Supported outputs include PST, MSG, EML, RTF, HTML, and PDF, with original folder hierarchy preservation. Windows 11, 10, 8.1, and 8 are supported in 64-bit versions.
Pricing is organized into three paid tiers. Corporate costs $99 with OST-to-PST conversion, mailbox previews, and saving to PST, EML, MSG, RTF, HTML, and PDF. Technician costs $199 and includes Corporate features plus batch conversion of multiple OST files, PST compaction and splitting, and exports to live Exchange and Microsoft 365. Toolkit costs $499 and adds a 7-in-1 Outlook toolkit for converting, repairing, splitting, compacting, merging, undeleting, and resetting Outlook passwords. The listed pricing uses one-time plans shown with annual billing, and regional pricing may differ.
The product’s strongest fit is mature OST conversion with a practical path from individual recovery to larger mailbox operations. Auto-location of OST files, encrypted-file conversion, preview before saving, and hierarchy preservation address common recovery requirements, while Exchange and Microsoft 365 exports support migration workflows. Its Windows-only scope and lack of a free plan make it less suitable for teams needing cross-platform access or no-cost evaluation. Choose Corporate for straightforward conversion and Technician when batch processing or direct service exports matter; choose Toolkit when broader Outlook repair and management functions justify the higher tier.
Stellar Converter for OST pros and cons
- Where it wins
- Converts encrypted and inaccessible OST files into multiple formats
- Preserves folder hierarchy and previews mailbox items before export
- Technician tier supports batch conversion and Exchange or Microsoft 365 export
- Where it doesn't
- Windows-only support limits platform flexibility
- There is no free plan for basic conversion work
- Batch conversion and live exports require the $199 Technician tier
Stellar Converter for OST fact sheet, pricing and score →
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