Friday, May 24, 2024

Compress PST File- Best Software to Reduce PST File Size

Many users have the question “how do I reduce the size of an Outlook email?” If you are having the same question then you are in right place. If you are also facing situations like PST file corruption, poor Outlook performance, and others.

The reason for all these sudden issues can be oversized or large PST files. Though to overcome these oversized PST files you should reduce PST file size. To do that we have stated the top compress PST software to effectively and efficiently reduce the size of Outlook data files. Go through each utility to find the best-suited software for yourself.

Best PST Compact Software-2022

#1. MacSonik PST Compress Tool for Mac

The first tool which we have on the list today is MacSonik PST Compress for Mac. This tool offers 100% safe and accurate compression of PST files. It effectively compress and compacts large-sized PST files without any data alteration.

This PST Compress Software maintains data integrity throughout the entire PST compression process.


  • The software provides an option to compress & compact batch PST files.
  • There is no requirement to install Outlook to compress PST files on Mac.
  • You can compress the size of the attachments and save them in a different/same folder.
  • The tool also allows its users to split the resultant PST file into MB and GB.
  • You can preview the files before reducing the PST file size.
  • Users can eliminate duplicate PST files from the compress.
  • The tool has a user-friendly interface and is compatible with all versions of macOS.

#2. Aryson PST Compress Tool

The second premium software to shrink PST file size is Aryson PST Compress Software. It is an advanced utility to reduce PST file size with high precision.

When the PST file size exceeds its limit, its corruption chances also increase. To prevent that this tool helps in reducing the file size and saves the file from corruption.


  • The tool is best to compact PST files without any loss.
  • This utility can also remove all attachments from a new PST file.
  • The tool can compress both ANSI and UNICODE file sizes.
  • It removes the duplicate items from the PST file and compresses its size.
  • You can compact single or multiple PST files with a single click.

#3. Sysinfo PST Compress and Compact Tool

The other best tool we have on the list to reduce PST file size is Sysinfo PST Compress and Compact Tool. Its unique features stand it out from the above-mentioned software.

It offers features like adding passwords to the resultant PST file, saving the attachments separately in a separate folder, and many more.


  • A user can add a password to the compressed PST files.
  • The tool performs the entire process in a quick and safe manner. It does not cause any change to the original PST files.
  • You can remove, compress and save the attachments in a separate file folder.
  • The tool has an interactive and user-friendly interface which makes the process quick and easy.

#4. Cigati PST Compress Tool

The second last yet advanced PST compression software is Cigati PST Compress Tool. This utility can reduce PST file size in the most effective and efficient way. It allows the users to use the demo version of the tool without investing money into it.


  • You can customize the destination path for the emerging PST file.
  • It has an interactive interface, so anyone can use the software.
  • You can compress the attachments along with emails.
  • One can also leave the attachments during the compression process.


This utility is only compatible with Windows 10 and its below versions.

#5. DRS PST Compact Tool

Last but not the least is DRS PST Compact Tool. The tool can reduce PST file size with ease. It can compress a PST file containing items like emails, contacts, calendars, tasks, and many more. Along with that it also offers to apply the in-built features of the tool.


  • The tool offers some smart features which help in selective conversion.
  • One can select single/multiple files with just a single click.
  • You can even download the report, upon the completion of the whole process.


A user can only compress 50 emails per folder in the trial version.


An oversized PST file can cause issues like corruption, data loss, and many others. To avoid all these issues we have listed down by far the best tools to reduce PST file size. The list includes the latest best 2022 software to compress PST files on Mac.

We would suggest you go through each software to get through each software to compress Outlook PST. Among all of this software, we suggest you go with MacSonik PST Compress Tool for Mac to compact PST file size.

Ankit Roy
Ankit Roy
Ankit Roy is a professional Technical Content Developer and Analyst. He has great knowledge about Email Backup, Cloud Migration, File Conversions & Data Recovery for Mac. He developed his skills in technical content writing throughout his undergraduate days. Ankit Roy additionally developed his skill in Google Analytics, Keyword research, and Webmaster tool.

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