How to Compact Large PST Files in MS Outlook Without Data Loss?

THOMPSON01

Member
May 10, 2025
41
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My Outlook PST file has grown very large, and it is slowing down the performance of my Outlook application. I am worried that if the file size keeps increasing, it might get corrupted. I have heard about compacting PST files, but I am not sure what the safest method is to do this without losing any data or attachments. Can anyone guide me on how to compact oversized PST files in MS Outlook step by step? Also, are there any reliable tools that can help reduce the file size effectively?
 

loganellis

New member
May 22, 2025
10
0
1
If your Outlook PST files have become too large and are slowing down Outlook performance, then the DataVare Outlook PST Compact Expert Tool is the perfect tool for you. This software compacts PST files without any data loss and helps Outlook run smoothly.

Key Features:

Safe PST compaction without data loss
Compatible with any Outlook version (Outlook 2019, 2016, 2013, etc.)
Supports both ANSI and UNICODE PST files
Batch compacting of multiple files
Simple and user-friendly interface

This tool is specially designed for those users who want to improve their email management. I have used this tool myself, and the result is amazing.
 
You can reduce the size of large PST files in Outlook either manually or with a professional tool. The manual method involves using Outlook’s in-built feature: go to File > Account Settings > Data Files, select the PST file, click Settings > Compact Now, and Outlook will reclaim unused space without affecting your data. You can also split data by exporting older emails into a separate PST file. However, these methods can be time-consuming if you have multiple or very large PSTs. For a faster and safer solution, you can try the Aryson PST Compress Tool, which automatically compresses large PST files by removing or extracting attachments, reducing file size efficiently while keeping your emails and other items intact.