4 Top Split PST Converter Tools in 2026: Pros, Cons & Comparison

Introduction

Large Outlook PST files can affect performance, make email management difficult, and increase the risk of data-access problems. A reliable PST splitter can divide oversized PST files into smaller, manageable parts while maintaining mailbox organization. In this comparison, we review four useful Split PST solutions: Softaken Split PST Pro, GainTools Split PST, DataVare Outlook PST Split Expert, and Mailvita Split PST for Mac. We compare their splitting methods, usability, compatibility, folder handling, and overall usefulness. The goal is to help Outlook users, IT professionals, and organizations select a suitable tool for managing large PST archives. Each software has its own strengths, so the best choice depends on your operating system and specific splitting requirements.

1. Softaken Split PST Pro

Softaken Split PST Pro is a powerful solution for users who need greater control over how large Outlook PST files are divided. It supports multiple splitting methods, including size, folder, year, sender, attachment size, category, tags, and item type. Users can select specific folders or subfolders instead of processing an entire mailbox. The software supports ANSI and Unicode PST files and does not require Outlook installation. A useful advantage is its preflight validation, session logging, and SplitReport.json reporting, which can benefit IT and compliance teams. It is particularly suitable for users who want flexible, customizable PST splitting rather than relying on only basic size-based division.

Pros

• Multiple advanced PST splitting methods.
• Split by size, folder, year, sender, attachment size, category, and more.
• Supports ANSI and Unicode PST files.
• No Outlook installation required.
• Allows selective folder/subfolder splitting.
• Provides reporting and session logs.
• Supports Windows 11, 10, 8.1, 8, and 7.

Cons

• The full version is paid.
• It processes one PST file at a time.
• Corrupted PST files should be repaired before splitting.
  
  

2. GainTools Split PST

GainTools Split PST is a practical choice for users who want to divide oversized Outlook PST files without a complicated workflow. The software provides three primary splitting options: by size, folder, and year. It supports both ANSI and Unicode PST files and works with PST files created by multiple Outlook versions. Users can preview their PST data before selecting the desired splitting method and output location. Its straightforward interface makes it suitable for users with limited technical knowledge. GainTools is especially useful when the primary requirement is to break a large PST into smaller files for easier management, storage, and Outlook performance.

Pros

• Simple and easy-to-use interface.
• Split PST by size, folder, or year.
• Supports ANSI and Unicode PST files.
• Supports multiple Outlook versions.
• Allows users to select specific PST files.
• Preview option available before splitting.
• Provides a free trial.

Cons

• Only one PST file can be split at a time.

3. DataVare Outlook PST Split

DataVare Outlook PST Split Expert is designed to divide large Outlook PST files into smaller, manageable PST files. It supports both ANSI and Unicode PST formats and allows users to split data according to file size, year, or folder. The software works independently without requiring Microsoft Outlook, making it convenient for users who want a standalone PST splitting solution. Users can specify a desired size in MB or GB and save the resulting PST files to a selected local folder. DataVare is a good option for users whose main priority is reducing the size of oversized PST archives while keeping the process straightforward and manageable.

Pros

• Supports ANSI and Unicode PST files.
• Split PST by size, year, and folder.
• Allows size selection in MB or GB.
• Works without Outlook installation.
• Supports multiple Outlook versions.
• Simple standalone application.
• Saves split files locally.

Cons

• Does not support corrupted PST files.
  
  

4. Mailvita Split PST for Mac

Mailvita Split PST for Mac is a dedicated PST splitting solution for Mac users who need to divide large Outlook PST files into smaller parts. The software supports ANSI and Unicode PST files and provides three main splitting methods: size, folder, and year. It can preserve the original mailbox structure and create new PST files after splitting. The application works as a standalone utility without requiring Microsoft Outlook. Its Mac compatibility makes it particularly useful for users working with Outlook data in a macOS environment. Mailvita also provides filtering for selected PST files and generates a report showing the number of PST files created.

Pros

• Designed specifically for Mac users.
• Supports ANSI and Unicode PST files.
• Split PST by size, folder, and year.
• Preserves the original folder structure.
• Works without Outlook installation.
• Creates a report after splitting.
• Supports selective PST processing.

Conclusion

All four tools provide practical solutions for managing oversized Outlook PST files, but their capabilities vary. Softaken Split PST Pro is the best overall choice for users who want advanced splitting rules, selective folder processing, attachment-based filtering, reporting, and detailed control. GainTools Split PST is a strong option for users who prefer a simple interface and straightforward size, folder, and year-based splitting. DataVare Outlook PST Split Expert is suitable for basic and size-focused PST division, while Mailvita Split PST for Mac is the most relevant choice for Mac users. Your final selection should depend on your operating system, PST size, desired splitting method, and level of customization required.

FAQs

1. What is a Split PST tool?

A Split PST tool divides a large Outlook PST file into multiple smaller PST files. This can make mailbox data easier to manage and may help reduce problems associated with oversized archives.

2. Which is the best Split PST tool in 2026?

For advanced splitting and customization, Softaken Split PST Pro is the strongest overall option. It offers more splitting criteria than the other tools reviewed.

3. Can these tools split PST by size?

Yes. Softaken, GainTools, DataVare, and Mailvita all provide size-based PST splitting.

4. Can PST files be split by year?

Yes. All four reviewed tools provide year-based splitting, allowing users to organize older Outlook data into separate PST files.

5. Can corrupted PST files be split?

Generally, no. The reviewed tools indicate that the source PST should be healthy before splitting. If the PST is corrupted, it should first be repaired using an appropriate PST recovery or repair solution.

6. Which tool is best for Mac?

Mailvita Split PST for Mac is the dedicated option among these four for macOS users. It supports splitting by size, folder, and year and works as a standalone application