Top 10 OST to PST Converters in 2025 – Reliable Tools for Safe Email Recovery

When using Microsoft Outlook, your mailbox data is stored in two types of files – OST (Offline Storage Table) and PST (Personal Storage Table). The OST file allows offline access to emails, but when Exchange Server becomes unavailable or your profile is deleted, the OST file becomes orphaned and inaccessible. To regain access to this data, users need to convert OST to PST.

There are many conversion tools available online, but not all provide reliable results. Below, we’ve listed the Top 10 OST to PST Converters in 2025, based on their performance, accuracy, features, and ease of use.

1. MailsDaddy OST to PST Converter – The Best Overall Solution

MailsDaddy OST to PST Converter is the most recommended and top-rated tool for converting OST files into PST and other popular formats like MBOX, EML, and MSG. It handles healthy, corrupted, and orphaned OST files with ease. The tool also ensures that the folder hierarchy, email properties, and metadata remain intact during conversion.

Key Features

• Converts OST to PST without Outlook installation

• Supports encrypted and large OST files

• Provides a detailed preview of mailbox data

• Allows selective conversion of items

• Supports all Outlook versions (2003–2021 & Office 365)

• Exports data to PST, MBOX, EML, MSG, and others

Pros

• Fast and secure processing

• User-friendly interface

• Multiple export formats

• Lifetime license with free updates

• Affordable for both individuals and businesses

Cons

• Free version allows limited export

• Desktop-based software only

Verdict

MailsDaddy OST to PST Converter stands out for its speed, accuracy, and reliability. It is an all-in-one solution suitable for beginners, professionals, and enterprise users.

2. Stellar OST to PST Converter

Stellar is a leading brand in data recovery and file conversion solutions. Its OST to PST Converter is widely recognized for deep scanning, high precision, and excellent recovery of deleted mailbox items.

Key Features

• Recovers and converts damaged or orphaned OST files

• Preview before saving

• Exports OST to PST, Office 365, and Live Exchange

• Supports bulk OST conversion

Pros

• Recovers deleted or lost items

• Intuitive GUI

• Reliable customer support

• Supports large OST files

Cons

• Higher pricing

• Requires Outlook installation for export

Verdict

Perfect for users looking for premium recovery features and excellent accuracy, but the pricing may not suit every budget.

3. SysTools OST to PST Converter

SysTools is another well-known name in the data migration industry. Its OST to PST converter supports batch file conversion, making it ideal for enterprise-level data migration.

Key Features

• Converts multiple OST files in one go

• Maintains original folder structure and metadata

• Allows splitting of large PST files

• Exports OST to PST, MSG, EML, HTML, and PDF

Pros

• Bulk conversion support

• Data integrity maintained

• Reliable and fast

• Various output formats

Cons

• Complex interface for new users

• Limited saving in demo version

Verdict

SysTools OST to PST Converter is an enterprise-grade tool suitable for IT professionals and system administrators.

4. Kernel for OST to PST Converter

Kernel is a strong competitor offering powerful features for data recovery and migration. It can restore data from encrypted or damaged OST files and export directly to Office 365 or Exchange.

Key Features

• Recovers and converts corrupted OST files

• Supports direct migration to Office 365 and Live Exchange

• Preserves all metadata

Pros

• Multiple saving options

• Fast and efficient recovery

• User-friendly interface

Cons

• Higher cost compared to others

• Demo version limitations

Verdict

Kernel OST to PST Converter is great for users needing both recovery and migration capabilities in a single solution.

5. Shoviv OST to PST Converter

Shoviv provides professional-level OST conversion with advanced features like batch processing and migration to cloud services. It is known for handling large OST files smoothly.

Key Features

• Converts OST to PST, EML, MSG

• Exports OST data directly to Exchange/Office 365

• Maintains data consistency

Pros

• Batch file conversion

• Direct migration options

• Reliable and accurate results

Cons

• Advanced features can be overwhelming for beginners

• Expensive for individual use

Verdict

Best suited for organizations that perform large-scale email migrations frequently.

6. Aryson OST to PST Converter

Aryson offers a cost-effective yet reliable tool for OST to PST conversion. It supports multiple output formats and works with both healthy and damaged OST files.

Key Features

• Converts OST to PST, EML, MBOX, PDF, MSG, and HTML

• Maintains folder hierarchy

• Allows selective export

Pros

• Affordable pricing

• Simple interface

• Multi-format conversion

• Compatible with all Outlook versions

Cons

• Limited advanced recovery features

• Demo version restrictions

Verdict

Aryson OST to PST Converter is ideal for home users and small businesses looking for an easy and affordable option.

7. Cigati OST to PST Converter

Cigati Software provides a secure and flexible conversion tool. Besides converting OST to PST, it also migrates data directly to Gmail, Yahoo, and other email clients.

Key Features

• Converts OST to PST, MBOX, EML, and PDF

• Direct cloud migration (Gmail, Yahoo, Thunderbird)

• Recovers data from corrupted OST

Pros

• Cloud migration support

• Fast performance

• Supports multiple formats

 Cons

• Some features locked in premium plan

• Occasional lag with very large files

Verdict

Best choice for users looking for cloud-compatible OST conversion.

8. Softaken OST to PST Converter

Softaken provides a simple, easy-to-use interface for quick OST to PST conversion. It’s designed mainly for individual users and small-scale conversions.

Key Features

• Converts OST to PST and other formats

• Retains folder structure and attachments

• No Outlook installation required

Pros

• Affordable

• Lightweight and fast

• Works offline

Cons

• Outdated interface

• Lacks advanced enterprise features

Verdict

Softaken OST to PST Converter is a good pick for users who want a straightforward, low-cost conversion tool.

9. DataHelp OST to PST Converter

DataHelp Software offers a lightweight yet robust OST conversion tool. It is known for simplicity and efficiency.

Key Features

• Converts OST files quickly

• Preserves folder hierarchy

• Works on all Windows OS versions

Pros

• Easy-to-use interface

• Quick conversion speed

• Maintains data integrity

Cons

• Fewer customization options

• Limited customer support

Verdict

Ideal for users looking for a lightweight, reliable, and budget-friendly tool.

10. BitRecover OST to PST Wizard

BitRecover is another excellent OST converter offering strong file recovery capabilities and multiple export options.

Key Features

• Supports encrypted OST files

• Converts OST to PST, MSG, EML, and more

• Works offline

Pros

• Secure and stable conversion

• Selective data export

• Maintains metadata

Cons

• Slightly expensive

• Interface could be improved

Verdict

BitRecover OST to PST Wizard is a dependable option for users who value data security during migration.

Final Verdict: Which One is the Best?

While all these tools provide effective OST to PST conversion, MailsDaddy OST to PST Converter stands out as the best overall choice in 2025. It combines speed, accuracy, and affordability in one package. The software supports all types of OST files, maintains 100% data integrity, and doesn’t require Outlook installation.

Whether you’re a home user trying to recover personal emails or an IT administrator managing enterprise mailboxes, OST to PST Converter delivers the perfect balance of performance and simplicity.