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Software to convert an .ost to .pst

Kim Levya
Kim Levya asked
Last Modified: 2018-07-10
Does anyone happen to know of a decent downloadable software to convert a .OST to .PST ?
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Kim LevyaIT Manager


Thanks Ramin...looking into the corporate or technician version which is more money?
Bill PrewTest your restores, not your backups...
Expert of the Year 2019
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I looked at these three products which seemed to be the leaders about a year ago, but as I recall the OST I was trying to convert was just too large for any of these (or at least the trials) to deal with in a useful amount of time.  But it was a big file, over 2GB as I recall.  You might want to take a look at these if your needs are not as large.  I couldn't find anything useful in the freeware space...

RaminTechnical Advisor

Kim LevyaIT Manager


Just downloaded will let you know !!
RaminTechnical Advisor

I'm glad I could help, and Thanks.


There are several methods to convert OST file to PST file.

First, Microsoft does not provide an official tool to do the conversion. However, if you can access the contents of the OST file in your Outlook, then you can perform the conversion manually, as follows:

1. Start Outlook. Make sure you can access all the contents in the OST file to be converted.
2. Create a new PST file.
3. Go to the OST file, select and copy all the contents to be converted with your mouse.
4. Go back to the new PST file, then paste all the contents into the PST file

That will do the ost 2 pst conversion.

You can also perform the conversion by exporting the contents of OST file to PST file by following the instructions at:


Second, if you can access the Exchange server containing the account data for the OST file, then you can use Export-Mailbox command to export the data into a PST file, similar to convert your OST file into a PST file. Below is the article about doing that:


Third, you can try  a free OST to PST converter via Outlook VBA . Below is the article about doing that:


Hope this will help. Good Luck
You may get help from Microsoft Top OST Recovery Application to easily restores inaccessible Offline.OST files to a live Exchange server, convert to a new Outlook.PST of append to an existing PST.



I checked all products but did not get good result. i used Softaken OST FIle Exporter tool and found 100% accuracy with same folder hierarchy
E ATech Lead

Geeta MalikTechnical Content Developer

Mails Daddy to convert .ost to .pst tool is also available as I come to know about this tool while writing an article for  PST to Office 365 migration. Free download is available here:  http://www.mailsdaddy.com/ost-to-pst-converter/
Kim LevyaIT Manager


Thanks Greeta, I purchased SysTools OST to PST Converter....was in a crunch.
Geeta MalikTechnical Content Developer

Hi, Kim Good to hear that you query has been already solved :)
multiple utilites and same result, after analyizing all i used https://www.softaken.com/ost-file-exporter this tool and sucessfully converted my OST files. thanks for offering such kind of products
denise smithMarketing

There are various well known software's are listed, but I would like to introduce one more in that list, Shoviv OST to PST converter. It has many advanced features, which enable its user to effortlessly convert multiple OST files to PST in a single attempt. The software supports all MS Exchange and Outlook versions. For more information's, visit- https://www.shoviv.com/ost-to-pst-converter.html

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