How to Reduce PST File Size Without Outlook – Query Resolved
If you are also an Outlook user who is frustrated with a large PST file and wants to reduce PST file size without deleting any data, then you are on the right page. This blog has the simplest and easiest ways to reduce Outlook mailbox size using the Compact option, the Clean Up option, and by deleting other unwanted folders and items. Also, if you don’t want to delete any item and want to shrink your file without Outlook installation, then download the PST Splitter Tool for Windows.
Outlook creates PST format, which is used to store data like email, contacts, calendar, notes, journals, and other items. The PST file can store limited data according to the size, which depends on the version, like:
- Outlook 2002: 2 GB
- Outlook 2003 & 2007: 20 GB
- Outlook 2010 & Later Versions: 50 GB
Here you will get complete information, one by one, with a proper guide to reduce PST file size without Outlook account.
How to Reduce Outlook Mailbox Size Without Deleting?
We can easily reduce Outlook mailbox size limit using the Compact option, Cleanup old items, mailbox cleanup, by deleting item folders, and by archiving old emails and files. These are the only built-in solutions to reduce PST file size using the Outlook account.
#1: Compact Now Option
This is the built-in option to reduce Outlook mailbox size without deleting any email or item. So, you can go for this method:
- Open your Outlook account.
- Select the “Account Settings” option twice from the “File” tab.
- Head to the “Data Files” tab and select the PST file to compact.
- Choose the “Settings” and then the “General” tab.
- Finally, select the “Compact Now” option to reduce PST file size.
#2: Delete Unwanted Items and Folders
If you have not cleaned your mailbox for a long time, and it contains unwanted emails and folders, then remove them one by one for more storage space. And also, make sure to delete all data from the Trash folder as well after normal deletion:
- Open any email and folder in Outlook.
- Select the “Delete” option.
- And your folder and email will be deleted.
- Now head to the “Trash” folder and remove the deleted emails permanently.
#3: Clean Up Old Items
- Launch your Outlook.
- And go for the “File” >> “Tools” >> “Mailbox Cleanup” option.
- Here you can select the given options like:
- View Mailbox Size: Analyze your mailbox size to determine where most storage space is being used.
- Find Item Older Than: You can find older emails through a date range and delete them.
- Empty Deleted Items Folder: Clean the deleted item folders to free up space.
- Archive: It allows moving selected emails into a separate data file.
#4: Archive Old Data to Reduce PST File Size
Also, if your mailbox contains older emails and folders that are important for you and that you can’t delete. Then archiving them is one of the best ways to keep your data and for better space.
- Head to the “File” tab.
- Choose the “Tools” >> “Clean Up Old Items” options.
- Now select the “Archive this folder and all subfolders” and then choose a folder that you want to archive.
- Select a date range according to your needs.
- Finally, select the “OK” button, and your Outlook will move selected folder items into the archive.
What are the Major Setbacks of Manual Methods?
- MS Outlook installation is required on your system.
- The deletion method (method 2) has a high risk of accidental deletion of important emails.
- Basic technical knowledge is required for Outlook.
How Does the Given Solution Work to Reduce PST File Size?
This is one of the best and amazing solutions that allows users to decrease the mailbox size without deleting any email or data. It will split large PST file into smaller parts, so that users can easily manage data easily. Also, it allows users to divide files by size, date, year, subject, email ID, etc., with other advanced features. If you faced any problem during the live process, so you can contact us during the live chat support. You just have to download and install the above-mentioned solution to reduce PST file size without Outlook.
- Download the mentioned tool for free on your system.

- After that, find and load your PST files and folders to the panel using the “Add Files” and “Folder” options.

- Set the destination location where the output will be saved after decreasing PST size without MS Outlook.

- Select the folders to be reduced and select any advanced option according to your requirements.

- And then select the “Next” button to continue the process.

- A quick summary will appear on the screen to confirm, and then choose the “Next” button to start the process.

- Now live process to reduce PST file size will start on the screen.

- After completing the process, a confirmation message will appear, and choose the “Ok” button.

#6: Another Alternate Solution to Reduce Outlook Mailbox Size
Download the simple and efficient PST Compress Tool that helps you optimize and reduce the size of Outlook PST files. With this tool, you can easily reduce PST file size by compressing, recover storage space, and improve Microsoft Outlook performance. It provides a convenient solution for managing your Outlook data by reducing the size of single or multiple PST files. One of the best parts is that it maintains the original folder hierarchy and other components.
Important Note: This software actually removes attachments from Outlook emails, thereby reducing their size. If you do not want to delete the attached files, do not choose this solution.
Summary
If you also have a large and oversized PST data file or Outlook mailbox, then this is the right blog for you. We have explained the possible ways to reduce PST file size, including compacting now, deleting unwanted data, archiving old emails, and other manual methods. If you haven’t installed Outlook and want to shrink the data file without deleting anything, then you should go for the professional tool. We hope you find the article helpful. If you have any queries about this query, then contact us through live chat support.