Imagine you’ve just switched jobs and want to back up your essential Outlook email. But when you try to open your mailboxes, Outlook says, “Profile not available” or “Cannot open your default email address.” Now, you can’t access your old emails or other data. This situation is so annoying, but there is a solution. You need to convert the OST file to PST immediately!!

The manual OST to PST conversion process fail when your OST file becomes orphaned/corrupted. In 2025, there are many advanced automated OST to PST converters (free and paid) that convert OST to PST in just a few clicks.

In this blog, we will discuss the 5 best OST to PST converter tools that help users in situations just like yours. Whether you are an IT admin, professional, or student, these tools will help you to back up or maintain your normal Outlook workflow. Take these top OST to PST converter tools into consideration when you need to access, migrate, or backup OST files without any hassle!!!

Top Recommended OST to PST Converter Tools in 2025

Whether you access, backup, or migrate OST files, the tools listed below are top-rated and most recommended by professionals. Here is a brief overview of each tool; understand and pick them according to your requirements.

Kernel OST to PST Converter

In 2025, the Kernel OST to PST Converter tool is the most recommended tool to backup and migrate corrupted/healthy/orphaned OST files. It quickly converts OST files into secure formats like PST, MSG, EML, MBOX, etc.

Equipped with numerous features and capabilities, it makes your OST conversion smooth, easy, and secure. Moreover, it offers a free trial version with limited features, but you need to buy it for all its features and capabilities.

Other top-quality features of the tool are:

• Secure, handy tool with a zero data loss guarantee.
• Split the resultant PST file into multiple smaller PSTs.
• Recover permanently deleted items with OST and other data.
• No file size restrictions, and it supports batch OST conversion.
• The snapshot feature will be used to customise the OST conversion accordingly.
• Provide numerous advanced filters for specific OST file conversion.
• Facilitate a Preview feature to view mailbox emails or other data.
• Preserve original mailbox folder hierarchy, metadata, and properties.
• Migrate OST files to Office 365, Hosted Exchange, or IMAP servers directly.

Free Version:

• Preview all OST data.
• Convert 25 items per folder to PST, MSG, EML, PDF, etc

Paid Version:

• Convert unlimited OST data to multiple formats.
• Export unlimited OST data to multiple platforms and servers.

Recoveryfix OST to PST Converter

Recoveryfix OST to PST Converter is another leading software for accessing and converting OST files. It also converts corrupted, healthy, or orphaned OST files into several files like PST, MBOX, EML, PDF, HTML, etc., in a few clicks. This tool retains the complete OST data and guarantees zero data loss and no formatting issues. You can try it for free, but it requires a purchase to unlock its full version.

Other highlights of the tool are:

• Restore mistakenly deleted OST data.
• Recover all OST data with full accuracy.
• Convert multiple OST files of any size at once.
• Smart filters for selective OST data conversion.
• Generate a graphical file analysis report of OST files.
• Migrate OST files to Live Exchange, Microsoft 365, and IMAP servers.

Free Version:

• Open/read the entire OST data.
• Save 25 items per folder to PST.
• Migrate 25 items per folder to Office 365.

Paid Version:

• Convert limitless OST files.
• Migrate limitless OST files.

Shoviv OST to PST Converter

The Shoviv OST to PST Converter Tool is another easy-to-use and result-oriented tool for OST conversion. It recovers all OST file data and saves it in different formats like PST, EML, MSG, HTML, etc., quickly.

Other prominent features of the tool are:

• Convert multiple OST files without loss.
• Various filters for selective data conversion.
• It provides a preview option to open/read OST items.
• Migrate OST files to Office 365 and Live Exchange.
• Facilitate the incremental export feature to convert OST files conveniently.

Free Version:

• Save 50 items per folder.

Paid Version:

• Save all OST data.

DRS Convert OST to PST

The DRS Convert OST to PST is also a widely used tool for Outlook OST file conversion without data loss. Embedded with advanced features and capabilities, it makes the OST conversion process smooth, quick, and error-free. It has separate versions for broader compatibility with Windows OS and Mac OS.

Advanced features of the tool are:

• Convert multiple bulk OST files simultaneously.
• Convert OST files to PST, MBOX, EML, PDF, HTML, etc.
• Feature to save emails with or without attachment files.
• Migrate OST to various email clients and servers directly.
• Option to remove duplicate items for precise and time-saving conversion.

Free Version:

• Export 50 items per folder.

Paid Version:

• Export all OST data.

MailsDaddy OST to PST Converter

The MailsDaddy OST to PST Converter is another reliable and effortless tool for converting orphaned/corrupted OST files. It saves OST data in PST, EML, MSG, HTML, etc., within a minute. Its simple interface and functional features make it one of the most recommended tools for OST conversion.

Other highlights of the tool are:

• Provide a clear preview of OST data.
• Multiple helpful filters for selective conversion
• Perform bulk OST file conversion simultaneously.
• Preserve the original folder structure and hierarchy.
• Migrate OST files to Office 365 & Live Exchange Server.

Free Version:

• Process 20 items.

Paid Version:

• Process all OST data.

Wrapping Up

Whether your Outlook crashed or your email account changed, losing your Outlook data can be a real headache. So, these best OST to PST converter tools are reliable for secure and effective OST recovery in 2025. Every tool has its own strengths and features. Some are better for large files and bulk conversion, and others are better for quick conversions.

So, choose the tool according to your needs, such as speed, accuracy, migration facility, compatibility, and smoothness. As per my recommendation, I’d suggest using the Kernel OST to PST Converter tool. It is the best tool with multiple advanced and valuable features for quick, smooth, secure, and accurate OST conversion. So, use the free trial version to evaluate its effectiveness.