When Outlook users face issues with inaccessible, orphaned, or corrupted OST files, the most reliable way to access their data again is by converting OST to PST. Choosing the right converter can save time, ensure data integrity, and make migration much easier. In this guide, we’ll look at the 10 best OST to PST converters in 2025, their features, and why they stand out.

1. MailsDaddy OST to PST Converter

MailsDaddy OST to PST Converter tops the list for its simplicity, accuracy, and advanced features. It allows users to recover and convert corrupted, orphaned, or encrypted OST files into PST and multiple other formats like MBOX, MSG, and EML. With a clear preview panel and no file size limitations, it’s perfect for both individuals and enterprises.
Benefits:

  • Works without Outlook or Exchange dependency

  • Supports all Outlook versions (including 2021/2019)

  • Maintains folder hierarchy and metadata

  • Affordable with lifetime license

2. Stellar OST to PST Converter

Stellar is known for its professional-grade recovery and conversion tools. This converter ensures flawless OST to PST conversion and supports migration directly to Office 365 or Exchange.
Benefits:

  • Handles large OST files

  • Auto-detection of OST files

  • Advanced preview options

  • Trusted by enterprises

3. SysTools OST to PST Converter

SysTools offers a secure and bulk OST conversion tool with options to split large PSTs for easier management.
Benefits:

  • Batch OST conversion

  • Split large PST files

  • Advanced filters for selective export

  • Reliable for corporate users

4. Kernel OST to PST Converter

Kernel is known for its powerful recovery features and ability to handle corrupted OST files. It also supports direct migration to Office 365.
Benefits:

  • Recovers corrupted/orphaned OST

  • Direct export to Office 365

  • Selective conversion using filters

  • Compatible with all Outlook versions

5. Shoviv OST to PST Converter

Shoviv is ideal for bulk OST migrations with cloud support. It offers direct export to Office 365 and Live Exchange.
Benefits:

  • Incremental migration

  • Handles multiple OSTs at once

  • Maintains data integrity

  • Great for enterprise-level migrations

6. Aryson OST to PST Converter

Aryson is a cost-effective tool designed for beginners and small businesses. It converts OST to PST and other popular formats.
Benefits:

  • Easy-to-use interface

  • Supports encrypted OST files

  • Multiple export formats

  • Lightweight and affordable

7. Softaken OST to PST Converter

Softaken provides a simple and budget-friendly solution for OST to PST conversion with support for additional formats.
Benefits:

  • Batch conversion supported

  • Preserves email properties

  • Supports EML, MSG export

  • Good for personal/home users

8. DataHelp OST to PST Wizard

DataHelp is a minimalist tool focused on speed and accuracy. It’s a good option for quick conversions without extra complexity.
Benefits:

  • Maintains email formatting

  • Handles large OST files

  • Simple interface

  • Ideal for beginners

9. Cigati OST to PST Converter

Cigati offers multi-format export and cloud migration features, making it a modern and versatile option.
Benefits:

  • Saves OST to multiple formats

  • Migrates to Gmail, Yahoo, Office 365

  • Built-in preview option

  • Flexible for hybrid users

10. RecoveryTools OST Migrator

RecoveryTools is a professional-grade migrator supporting OST to PST along with 20+ other formats and platforms.
Benefits:

  • Batch migration supported

  • Direct migration to IMAP, Thunderbird, Apple Mail

  • Data filters for selective export

  • Great for IT professionals

Why MailsDaddy OST to PST Converter is the Best Choice

While all tools listed above are reliable, MailsDaddy OST to PST Converter stands out as the best in 2025 because of its perfect balance of ease of use, advanced features, affordability, and compatibility with all Outlook versions. It doesn’t just convert OST to PST but also provides multiple export options, preview features, and no file size restrictions—making it suitable for both personal and business needs. If you’re looking for a fast, secure, and cost-effective solution, MailsDaddy OST to PST Converter is the #1 tool to choose in 2025.

Also Read: How to Convert OST to PST Free Using PowerShell Commands