Many of these tools offer a free trial version, which allows you to convert a limited number of items to test the software's effectiveness before purchasing the full version.
Top OST to PST Converters in 2025
Here is a comparison of some of the top-rated OST to PST converters available in 2025:
| Software | Key Features | Pros | Cons |
| vSoftware OST to PST Converter | Converts corrupted or orphaned OST files, offers a date range filter, removes duplicates, and exports to multiple formats like PDF, EML, and MBOX . | Affordable, supports batch conversion, maintains data integrity and folder structure, and provides a preview mode . | The interface could be more modern . |
| Vartika OST to PST Converter | Verified by Microsoft MVPs, it recovers and extracts data from corrupted OST files and supports multiple export formats. It works on both Windows and Mac . | Fast, reliable for large-scale conversions, and offers 24/7 technical support . | Can be slightly expensive for individual users . |
| Stellar Converter for OST | A professional tool designed to convert inaccessible or orphaned OST files into PST format, preserving emails, contacts, and calendars . | Effortlessly converts OST files and is highly reliable . | The free version has limitations . |
| Kernel OST to PST Converter | Known for fast, error-free conversion, this tool converts emails with attachments and preserves metadata and folder structure . | Features a simple, user-friendly interface and ensures no data loss during conversion . | The free trial has limitations on the number of emails you can convert . |
| Webbyacad OST to PST Converter | Converts inaccessible OST files while maintaining data integrity and allows for selective folder conversion. It supports multiple export formats . | Easy to use with a modern interface, handles oversized OST files effectively, and has great customer support . | The trial version offers limited conversion capabilities . |
| Cigati OST Converter Tool | A budget-friendly option that provides email filter options and a preview feature. It is compatible with all versions of Outlook . | More affordable than many competitors and includes a free demo version . | Not as powerful for handling severely corrupted OST files . |
Most of these converters follow a similar process:
- Install and Run Download and launch the software on your PC.
- Select Files Add the OST file(s) you wish to convert. Many tools support adding files in bulk.
- Preview Data The software will scan the file and provide a preview of the recoverable mailbox items.
- Choose Export Format Select PST as the desired output format.
- Convert Click the convert button to begin the process. The software will save the new PST file to your chosen location.