Exclusive Features of the PST Compress Tool

Compress Large PST Files in Outlook

Compress Large PST Files in Outlook

The MacSonik PST Compact Tool allows users to compress more than one PST file simultaneously. With the batch selection option, users can add multiple Outlook PST data files and compress them simultaneously. It saves time and makes the process efficient, as well as saves unnecessary efforts.

Save Compressed PST Files Anywhere

Save Compressed PST Files Anywhere

After compressing the PST file, the PST Compression Tool allows users to manually select a desired location to save it. This helps users to avoid the risk of files being placed in any random location. By default, if no custom folder is selected, the compressed file will be saved to the desktop automatically.

Preview PST Mailbox Data Safely

Preview PST Mailbox Data Safely

The MacSonik software displays the PST mailbox items in a tree-like layout. The software lets users see both messages and attachments, making it simple to identify the right folders for compression. The user can easily select the desired folder and even preview its body and attached files.

Compress PST File Attachments

Compress PST File Attachments

The PST File Compressor Tool efficiently compresses email messages along with their attachments. Furthermore, it allows users to save the compressed attachments anywhere that they prefer. The user may also save attachments separately in a new folder or alongside the emails for easy access.

Merge PST Files Without Duplicates

Merge PST Files Without Duplicates

While it is common to seek to free up space when compressing PST files, a lot of users do not think of the fact that duplicates take up space, too. The Mac PST Compress Tool optimizes storage further by eliminating duplicate items by checking From, To, Subject, Body, and Bcc.

Split Resultant Outlook PST File

Split Resultant Outlook PST File

The MacSonik PST Compress Tool not only compresses PST files but also splits the compressed PST files into smaller parts. If the file size is still too big, the user can split it down based on size, making large PSTs easier to handle.

Skip Attachments While Saving Outlook Emails

Skip Attachments While Saving Outlook Emails

The PST Compress Tool for Mac provides a feature to choose to exclude attachments and compress only the messages. These options are available in the Compress Option Panel. Users can select the preferred option to allow targeted compression of mailbox data.

Secure and Dependable Software for Outlook Data

Secure and Dependable Software for Outlook Data

Recognized as a top Outlook Emails Compress Tool, it safely compacts the PST files of any size without damaging the data. It ensures the integrity of your data while compressing files and works seamlessly across all Windows versions, including Windows 7 and Windows 10.

Free PST Compress Tool

Free PST Compress Tool

This Compact PST Files Software for Mac comes with a trial version to test its performance and functionality. While the trial offers the same capabilities as the full software, it is limited to compressing 50 PST files. A full version is required to compress unlimited PST files.

Interactive GUI Simplifies PST File Tasks

Interactive GUI Simplifies PST File Tasks

MacSonik’s Compact PST Tool features an easy-to-use interface, ensuring ease of use for everyone. Both technical and non-technical users can reduce PST file size effortlessly and independently. In addition to this, for additional help, the support team is available 24/7.

Best PST Compress Tool - System Requirements

Ensure that all the mentioned requirements of the software are fulfilled to operate it smoothly.

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Trial Limitations

Run the Free PST Compress Tool to test all the functions of the utility before buying it. It is restricted to converting only 50 MBOX messages.


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System Requirement

Operating System: macOS 13 Ventura, OS 12 Monterey, OS 11 Big Sur, and below versions.

Hard Disk Space: 500 MB of free space required

Processor: Apple Silicon M1, M2, M3, M4, and newer Apple Silicon processors (including M5)

RAM: Minimum 4 GB (8 GB Recommended)


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About Software

Version: 23.04

Size: 134 MB

Release Date: 13th September, 2025

License Tyes: Home, Administrator, Technician, and Enterprise



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Software Prerequisites

  • If you are operating Windows OS 11, 10, 8, or 7 (32-bit or 64-bit), then you must launch the tool as an Administrator.
  • Turn off the Windows Firewall for proper installation.
  • Disable the Antivirus programs.

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Additional Information

To run this tool smoothly on Mac, follow the below-mentioned steps:

  1. Launch Mac OS.
  2. Go to the Finder Bar >> Go menu.
  3. Select the Applications option.
  4. Choose System Preferences.
  5. Click on the Security & Privacy.
  6. Here, select the Firewall tab, and choose to Turn Off the firewall.

If Yes! Please disable your antivirus temporarily or allow access from its setting so that the software can carry out its function.

It is advised to avoid the source file from any shared drives or networks (NAS, SAN, LAN, and WAN) as it should be on the same working machine.

Comparison of the PST Compress Tool Online Free and the Full Version

Product Features Free Version Full Version
Compress Oversized PST Files to Free Up Space
Reduce PST File Size Individually or in Bulk 50 Emails per Folder All
Detailed PST File Preview before Compression
Compress All Email Attachments in New PST Files
Delete Attachments to Reduce PST File Size
Save All Attachments from PST Files to a Separate Folder
Remove Duplicate Emails in Outlook PST Files
Split Resultant PST Files by Size or Date
24*7 Tech Support
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Frequently Asked Questions

Ans: Follow these simple steps to compress Outlook PST files with this software:

  1. Download, install, and open the MacSonik tool on your system.
  2. Next, press the Browse button to locate your PST file for compression.
  3. Now, choose your PST file, click Open, and then select Next.
  4. After that, mark the mailbox items to include and again click Next.
  5. Then, explore the features in the Compress Option Panel to customize compression.
  6. Next, define the destination by clicking Path to Save.
  7. To finish, click Start Compression to compress the selected PST file.

Ans: No, there is no PST file size limitation in the Mac PST Compress Tool. It can compress PST files of any size and can process them quickly and effectively.

Ans: The PST File Compression Tool has a Compress Option Panel feature for compressing attachments along with emails. To save attachments separately, enable the Remove All Attachments and Compress them in a Separate Folder option.

Ans: Yes, PST file compression can be done without including attachments. Just check the Remove all attachments in the new PST file option in the Compress Option Panel to activate it.

Ans: No. The Compact PST Files Tool does not support corrupted PST files. It is designed to work only with intact PST files. To shrink a corrupted PST, repair it first with MacSonik PST Repair Software, then compact it as required.

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