Outlook 2019 PST File Too Large: How to Shrink It Safely?

Oct 29, 2025 - 2:44 AM

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  • I am using Outlook 2019, and my PST file has become too large, causing Outlook to run slowly and sometimes even freeze. I know that the PST file has a size limit, and I am worried it might get corrupted if it grows any bigger. Can someone please guide me on the safest way to reduce or shrink the PST file size without losing any important emails or data? I have already deleted a few old messages, but the file size has not decreased much. Are there any options in Outlook 2019 to compact the PST file, or do I need to use any third-party tools for this?

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  • If your Outlook PST file has become too large, Softaken Compress PST Software is the perfect solution. This tool compresses large PST files without any data loss. It allows you to reduce the file size while preserving emails, attachments, and other items. This software works with all Outlook versions (e.g., Outlook 2019, 2016, 2013) and is extremely easy to use. With just a few clicks, you can lighten your heavy PST file and speed up Outlook. If you want to reduce the size of your PST file without any technical hassle, Compress PST Software is a reliable option.

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