PST Compress and Compact v5.0

Outlook PST Compress Tool to Reduce PST files Size Efficiently

User Ratings :   (Average Rating 4.8 Based on 96 Reviews)


PST Compress Compact

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SysInfoTools PST Compress and Compact Tool is the perfect solution to compress large PST files in the least amount of time. The Outlook PST Compress Tool has an exceptional ability to Compress and Compact PST files by removing big attachments and storing the compressed PST files in a separate folder or in the same PST itself. PST Compact tool flawlessly shrinks or reduce PST file size by removing irrelevant and redundant PST items. SysInfoTools PST Compression Tool not only provides seamless compression at ultrafast speed, but also provides features like Low footprints of exe file, high-Speed compaction, Search, and more.

  • Allow Batch Compression i.e. multiple PST files can be compressed in a single shot.
  • Shrink PST file size by removing or extracting attachments files.
  • SysInfoTools PST Compact Software compress PST files including attachments.
  • PST Compress Tool allow users to attach new PST files in outlook profile.
  • Supports PST compression of both ANSI & UNICODE PST file types.
  • PST Compact tool provides an option to apply password to new PST files.
  • Free PST Compact Software saves first 5 emails of every file after compression.

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Version: v5.0
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Price: $49
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Demo Limitations - Trial version is safe to download and compress 5 emails from each PST file

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Qualities That Makes SysInfoTools PST Compress Software an Exclusive Tool

Compress PST file
Batch PST Compression

SysInfoTools PST Compress Tool allows users to compress multiple PST files in a single click. Batch conversion of PST files is completely based on a user's preference whether users pick a single file at a time or several Outlook PST files. So, by using this option, users can save their precious time by multiple PST file compression. Read More..

reduce PST file size
Add New PST to Outlook Profile

This Inbuilt feature of Outlook PST Compress tool enables the users to add the new compressed PST files directly to their MS Outlook profile. This option helps users save all the Compressed PST files in their MS Outlook Profile. Therefore, making it easy for the user to search and locate compressed PST file. Read How to Determine MS Outlook Version?

PST compress
Encryption to Compressed PST Files

For every user's security is a major concern. The PST Compress Software supports the application of a password to the new PST file, now, users can protect new output PST files by applying a new password to the compressed Outlook files. Checkout blog How to Encrypt PST Files in Outlook 2010.

PST file too large
Safe and Secure PST Compression

The Outlook PST Compact Tool performs the entire compact process in a quick and safe manner without causing any changes or alteration to the original Outlook PST files. All the selected PST database files remain intact and untouched during the complete PST compression process. Read More..

PST compact
Compact PST in 4 different ways

The incredible PST Compact Tool makes the Outlook compaction process easy and effective because it provides four different ways to compress PST files. Through SysInfoTools' Outlook PST Compress Tool, users can choose option as per their convenient and needs. All the four methods are elaborated and discussed in below points.

Outlook data file size
Provide Easy Search Option

If you have no idea about the PST file location, you can search for it via the System directory using the "search facility" option provided by this PST Compact Tool. Simply define the location where PST files are stored, & the tool will find those files in couples of seconds. This feature saves the user's precious times but also allow them to compress Outlook PST in an easy way.

compress PST files
Removes, Compress and Save Attachments

This feature reduces PST file size and saves disk space by creating a completely new PST file while copying all contents of source PST file except attachments to a new PST file. It will prompt you for the location of a separate folder and store attachments in compressed form. If you think some attachments can be used in the future, then in that case you can save and compress attachments in a separate PST folder.

compact PST files
Removes and Saves Attachments

This option is a bit different from the previous option as it will store attachments in a compress form while this option will store them as it is. While removing the attachments from source PST file and copying all its contents except attachments to an entire new PST file, it will prompt you for a separate folder's location and store attachments in original form. Read how to convert ANSI PST to Unicode PST

large PST files
Remove Attachments

Removing unnecessary attachments of emails efficiently reduces the PST file size and protects your Outlook files from corruption. To reduce a PST file size and compress it, the PST Compress Software allows an option of removing of all the attachments. If you choose this smart option, the software will extract attachments which you don't want in your mailbox and removes them permanently. Additionally, this will shrink PST file size and remove the attachments from a system.

PST compression
Compress Attachments

Attachments always add to the size of PST file. This useful feature of PST Compact tool allows the user to compress all the attachments So if a user wants to shrink PST attachment file, then in case this features proves to be very helpful. Moreover, compressed files can be easily moved over the network because of their compressed nature and smaller data move promptly in comparison of huge data files. Learn How to Increase Outlook Mailbox Size in Latest Outlook 2013.

Compress PST file
Simple, Easy and Terse GUI

Compress PST tool has an Interactive and user-friendly interface that allow users to compress PST files with great ease. It is not obligatory for the users to have insightful awareness to install and implement PST Compress software. Any technical or non-technical users can use the software without putting any strain. If users still need guidance, our technical team is always ready to help 24/7.

PST compression
Compatible and supportable

It does not matter which version of Outlook or Windows Operating System you are using. PST Compress Software smoothly runs on all Windows-based platforms including the latest Windows 10. It also supports files created by all major versions of Microsoft Outlook like 2002, 2003, 2007, 2010, 2013, and the latest, 2016.

Important Note: This software doesn't support corrupt PST files. If PST file is corrupt, then use our PST Repair software

Why is it necessary to Compress large PST files?

Being an Outlook user, you must be aware of Outlook PST file size limit. The maximum size of PST file varies according to the Outlook version you're using. For e.g. if you're using an older version, i.e. Outlook 97 to 2002, the maximum size of PST file is only 2 GB and it's saved in ANSI format. On the other hand, if you're using Outlook 2003 or any later version including latest Outlook 2016, the maximum size of PST file is between 20 to 50 GB and it's saved in Unicode format. It's completely fine if you're using a Unicode PST file as you're having enough space to store your mailbox. However, if you're using an old Outlook version, this might be a problem for you. Read More..

When your mailbox reaches its maximum size, then it may cause some serious performance issues like PST files corruption and deterioration in the speed of your Outlook client. The problem doesn't here. In fact, it becomes worse than before if the mailbox crosses its maximum size which is 2 GB. Though a Unicode PST file has enough size limitation, but still it's not immune to such problems. Whenever a PST file is reached to its maximum size or crossed it, it can cause serious problems to Outlook users. In this situation, you must reduce PST file size to make it handy and smooth.

Comparison of Trial & Full Version

Product Features Free Version Full Version
Convert Ansi PST to Unicode PST and Unicode PST to Ansi PST files
Maintain all email meta information
Attach new PST files in Outlook profile
Support password protected PST files
Save Compressed files 5 Items(Each PST file) ALL
24*7 Tech Support & secure 100%
Price FREE $49
Money-Back Guarantee Download Buy Now
Specifications of PST Compress and Compact Tool

PST Compress Compact

Norton Seal windows 10 compatible

Trial Limitations

Demo version of the software come with one limitation it saves only first five mails of every mail folder after compression. This limitation of the demo version can be overcome by opting for the full licensed version.

Basic Requirements
  • Pentium class processor
  • Minimum 512MB RAM (1GB recommended)
  • 50 MB Software installation
  • Disk Space - Enough space to store recovered output

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Frequently Asked Questions

What happens when my MS Outlook is overloaded with PST files?

Huge PST files can raise the risk of data loss and slow down your Outlook performance. Freezing, corruption, and hanging of the Outlook PST file is common causes which arise due to huge and cumbersome PST file. This Outlook Compaction utility eliminates the chances of PST compression, reduces the PST File size and speed up the performance of Outlook. Read More..

Is there any size limit of PST files to Compress?

No there is no such limits. With SysInfoTools PST Compress Tool, you can easily compress Outlook PST file of any size. Read More..

Can I use this Outlook PST Compress Software to compress corrupted PST files?

No, you cannot use this software if your Outlook PST files are corrupt. Before using the Compress PST software, make sure the PST database files you need to compress are valid and in working condition. If your PST files are corrupt, then first use the PST Recovery software to recover it and then you can compress PST files.

How does this software work to compress the size of outlook PST File?

This PST Compression software compresses the size of PST file via four methods to reduce Outlook file size which you can choose according to your requirement:

  • Removes all attachments from new PST file, compresses and saves them in separate folder
  • Removes all attachments from new PST file and saves them in separate folder
  • Removes all attachments in new PST file
  • Compress all attachments in new PST file
I have some crucial data in my outlook PST file. Is there any risk of data being lost while compressing it?

Software provides you The PST Compress process is completely safe and secure when compressing Outlook PST file. There is no data alteration and loss as this software maintains the integrity of the original structure of the file. Read More..

How do I evaluate the software before purchasing its licensed version?

Our Company strongly recommends that users go through the demo version of Outlook PST Compress Software; users can download the free version online. With the demo version, users can get the whole idea of the software as the demo version contains exact same features and functionalities that of licensed version . Users can try free demo version of Compact PST tool which includes authentic and reliable functionalities. However, demo version comes with the limitation of saving only first 5 emails of every mail folder after PST compression. Users can go ahead and purchase full licensed version to unlock all features. Try it then buy it

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Client Reviews


By using this Compact PST tool, I could compress PST files. Because I had oversized PST files which were prone to corruption, it helped me to overcome the corruption issue and in many ways like whenever I had to share an important file through the network connection. Thanks!

- Sandy Taylor

I have used this PST Compress and Compact for the first time and I am impressed by its useful feature to compress PST file in a very quick way. I could easily share the PST file over network in quick time. Thank You.

- Kay Meyer

I am a professional person in constant need of PST file management issues that prompt me to compress PST file for many uses. This tool is amazing as it is quite safe to convert multiple numbers of PST files at once. Thanks for making such great tool.

- April Carpenter

The best part of the tool is that it removes all attachments in a complete new PST file, so it works great when we compress and compact the PST file for multiple things. I think it works great for organizing PST file in a refined way. Thanks for bringing such innovating product!

- Dorothy Holt

Well, it was great to work with the demo version as I could check all the features of this tool in advance. I have since purchased the tool and was able to compress PST files instantly. This is really a good way to compact and compress PST when you need to transfer it over network.

- Jasmine Jensen

We are quite impressed with the accuracy with which PST Compress tool worked. It helped in many ways like we could convert multiple number of PST files at once which save time thanks to its batch compression and safe operation.

- Teresa Hanson

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