Home » Blog » MS Outlook » Top 2 Ways to Reduce PST File Size Without MS Outlook

Top 2 Ways to Reduce PST File Size Without MS Outlook

As we know, the data can store in the PST file up to a certain limit can cause many errors. In the case of MS Outlook 2002 and earlier versions, the PST file was saved in ANSI format which has a 2GB of size limit. Whereas for Outlook 2003 and above editions, the UNICODE PST file is generated that has up to 50GB size limit. But, an issue occurs when the PST file is oversize. Also, this is one of the most commonly asked queries such as how to reduce PST file size.


So, today we consider this issue and come up with various techniques. Hence, we will describe free manual and professional methods to reduce Outlook data file size.

Advantages to Reduce PST File Size

  • It proves helpful for the users to manage Outlook mailbox data.
  • Reducing large PST files size can overcome some problems like hanging and Outlook’s slow performance.
  • It avoids the MS Outlook corruption issue.

Also Read: ScanPST Not Responding After Clicking Repair

Free Methods to Reduce PST File Size Instantly

The manual way is obtainable in two different workarounds. Both are discussed properly, you can follow any one of them as per your comfort.

Workaround 1: Use Compact Now Utility

1. Initially, choose the File tab and hit on Info.
2. Now, choose the Account Settings option, then again click on Account Settings to proceed ahead.

reduce pst file size
3. Select the Data Files option and click on Settings. After that, choose the preferred file and press Compact Now.

reduce pst file size without outlook
4. At last, click on OK to end the process to reduce the PST file size.

For MS Outlook 2003 and 2007 Versions

1. Navigate to the File tab and select the Data File Management option.

how to reduce size of pst file
2. Double-click on the Data File and select the targeted file which you want to reduce PST file size.
3. Now, click on the Setting and opt Compact Now option to move forward.

compact pst file without opening outlook
4. Finally, click on Exit to finish the process of breaking up a PST file.

Workaround 2: Archive Emails in Outlook

1. Click on the File tab and select Info and choose the option Tools >> Clean Up Old Items.

compress pst file without outlook
2. Select an Archive dialogue box displayed on your screen. Simply click on the ‘Archive this Folder and all Subfolders’ option. Then, opt for the file and folder to archive.

reduce size of pst file
3. Now, check the Include items with the Do not Auto Archive option to archive the desired files to consist of automatic archiving.

how to reduce size of pst file
4. Lastly, hit on OK to end the procedure which reduces Outlook PST file size.

Related: How to Export Outlook Contacts to vCard

What If the Manual Fails?

Yes, there is a high chance that the manual method can fail. Because the free method does not have the ability to reduce corrupted PST file size. Even the MS Outlook installation is necessary to perform the dividing Outlook data file procedure manually. But, no need to worry! Going through the upcoming segment, we will discuss an eminent approach to split archive PST without Outlook easily.

An Automated Technique to Reduce PST File Size

After understanding the fact, that the above-stated manual solution does not have the capability to reduce Outlook data file size effectively. Do not worry! You can use the “PST Splitter Software” to reduce PST files. It is one of the perfect and powerful applications to reduce oversized PST files without any data loss. Even, the tool supports reducing corrupt PST file size without MS Outlook installation.

Download Now Purchase Now

However, the application supports all editions of the Windows Operating System. The software provides several enhanced features for reducing Outlook data file size. You just have to simply free download and use the utility to resolve to split Outlook PST file into smaller parts.

Step-by-Step Guide to Reduce Outlook PST File Size Immediately

Below, you will get the instructions for dividing the Outlook data file. You just have to follow all the steps sequentially to implement the procedure to reduce the PST file size. Let’s begin:

1. Step: First, Install and Run the Software on your local machine.

reduce pst file size without outlook

2. Step: Then, Add PST file/folder(s) and desired destination path.

compact pst file without opening outlook

3. Step: After that, Choose the required split option (Split by Date, Folder, Year, Size, Email ID, and Category).

compress pst file without outlook

4. Step: Now, check the summary of split information and click Next to proceed.

reduce pst file size without outlook

5. Step: Finally, the process to reduce the MS Outlook PST file size is completed.

reduce size of pst file

Final Verdict

An oversize PST file can cause corruption and many other issues in the MS Outlook application. In this situation, many users require to reduce PST file size. Therefore, in this article, we have mentioned the free and automated techniques to reduce Outlook data file size. But, the manual solution of reducing Outlook data file size is having some limitations which affect reducing large PST file size procedures. Thus, it is recommended to go with the above-suggested alternative technique.

Frequently Asked Questions by the Users

Q. How to reduce PST file size without Outlook?

A. To reduce PST file size without Outlook follow the multiple steps:

  • Step 1.  Run the software in your system.
  • Step 2. Add the PST file/folder and select the desired location.
  • Step 3. Then, choose the format to Split the PST file.
  • Step 4. Give a view on the split information and click on Next.
  • Step 5. At, the last the process is completed to reduce PST without Outlook.

Q. Is this software a safe solution for non-technical users also?

A. Yes, this software is the best for both technical and non-technical users. Because this tool has been tried and tested by technical experts for more than 12 years and they have verified this software.

Q. Is there any need for MS Outlook installation to reduce the PST file size?

A. As we proceed with the manual solution to fix this error, MS Outlook must be installed on your system. However, if we opt for the tool-oriented solution, MS Outlook does not need to be installed.