How to Compress Outlook PST Files in 2025

[Ryancooper]

Compress Outlook PST files to optimize storage space and improve Outlook performance. The manual process involves reducing the file size by deleting unnecessary items and compacting the PST file. While this method is straightforward, it has challenges. Manual compression requires time and may not achieve significant size reduction if duplicate items or oversized attachments are present. Additionally, there’s a risk of data corruption if the PST file is already close to its maximum size. Managing multiple PST files manually can also be cumbersome.

To simplify the process, the Migrate Cloud Data PST Compress Tool offers an efficient solution. This tool automatically identifies and removes unnecessary data, compresses attachments, and reduces file size without compromising data integrity. It also supports batch compression, making it ideal for managing multiple PST files. Using this tool eliminates the risks associated with manual methods and ensures a seamless compression process.

[kikowap]

Are you looking for how to compress Outlook PST files in 2025? here I share with you the most reliable solution which is the OSTTOPSAPP Compress Outlook PST Tool. It supports all versions of MS Outlook. It easily compresses Unicode and ANSI PST files. It deletes unnecessary data to protect PST files from getting corrupted. No need for tools to install MS Outlook to compress PST files. It supports all versions of MS Outlook and Windows OS.