Convert OST to PST
For users planning to convert OST to PST in 2026, the Aryson OST to PST Converter includes several features designed for both individual and enterprise mailbox management. It supports conversion of single as well as multiple OST files while maintaining folder hierarchy, email formatting, attachments, timestamps, contacts, calendars, notes, journals, and tasks. Since the software works independently of Microsoft Outlook, it can also process inaccessible, offline, or orphaned OST files without relying on the original Outlook profile. Besides helping users convert OST to PST, the software also exports Outlook mailbox data into multiple formats, including MBOX, MSG, CSV, PNG, ICS, VCF, MD, and JSON. It provides a comprehensive preview panel where users can examine email content in HTML, Plain Text, MIME, Raw HTML, and Header views, along with mailbox items such as contacts, calendars, notes, and tasks before starting the export. This helps users verify mailbox content and avoid unnecessary conversions. Apart from this, a useful aspect of the software is its collection of mailbox management options. Users can apply Date Range Filters to export emails from a particular time period, automatically remove duplicate emails, rename output folders using Custom Folder Naming, split large PST files after conversion, perform incremental exports with Skip Existing Exports, and organize mailbox data through Default Folder Mapping. The utility also identifies corrupted, blank, invalid, or locked OST files before processing and generates an export report after completion, making it suitable for users who require accurate mailbox conversion with complete data integrity.
Read More: https://www.arysontechnologies.com/blog/how-to-convert-ost-to-pst-with-easy-methods/
Sunil
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Shashibhushan kumar commented
Another option for converting OST to PST is Free OST to PST Converter Tool. It converts single or multiple healthy OST files to PST without needing Outlook or Exchange Server installed. It includes a preview panel where you can browse the folder hierarchy and check sender, recipient, subject, date and attachments before starting the export, so you can confirm the mailbox content first.
For mailbox management, it has date range filters to export emails from a specific period, and lets you filter by sender, recipient, subject, message body, read/unread status or attachment availability. On the output side, it has a split feature to divide the PST by size (1GB, 1.5GB, 2GB, etc.), and it can skip empty folders and generate a conversion log report after export. It also extracts email addresses to XLSX or CSV, and pulls out attachments separately using file extension filters.
It supports Outlook/Microsoft 365 through 2024 and runs on Windows 11, 10, 8.1, and Windows Server 2022, 2019.
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Ash Croft
commented
The features mentioned here can definitely be useful, especially if you are dealing with an orphaned or inaccessible OST file. However, not everyone needs all of those advanced options just to convert an OST file to PST.
If the OST is still connected to a working Outlook profile, you can first try the built-in Outlook export option. Go to File → Open & Export → Import/Export, choose Export to a file, select Outlook Data File (.pst), and then select the folders you want to export.
The problem is that this method depends on Outlook being able to access the mailbox. If you only have an old OST file and the original Outlook profile is gone, you may need a tool that can process the OST directly.
For smaller OST files, OST to PST Converter is another option worth trying. Its free version lets you convert up to 500 MB of OST data to PST, so you can test the conversion without purchasing the full version first. You can also preview the mailbox data and filter emails before converting.
If you only need to recover or convert a smaller OST file, having a 500 MB free conversion limit can be enough to get the job done without paying upfront.
https://www.osttopst.com/