Are there any free offline .OST to .PST converters?

Rajaa Chowdhury June 16, 2013

Can anyone suggest me a truly freeware software to convert an offline OST file to PST format for MS Outlook 2010. All the so called freeware listing in Google are not truly freeware and are feature limited until I upgrade to a paid version, and I just need this for one time and therefore not ready to pay $99. I want to read the OST and just save it to a Outlook 2010 PST format.

  1. jonstewart408
    June 28, 2013 at 4:21 am

    Follow the blog
    Here complete conversion for OST to PST given......

  2. Phill Duplessis
    June 26, 2013 at 6:09 am

    You can use ost to pst conversion tool from

  3. Marshal Hubs
    June 24, 2013 at 5:57 am


    There are many solution to convert OST file to PST file, But If you have lost your email from OST file due to file corruption then conversion is not a solution. So I am sharing tool which can help to repair your damaged OST file then convert into PST file format. Download demo version from here :

    • Russell Smith
      July 17, 2013 at 6:05 am

      Hi Marshal,
      Thanks for you suggestion. I follow your suggested and finally get successful competition in conversion process.


  4. selina
    June 18, 2013 at 9:53 am

    Try OST Converter to easily restore emails from ost files.

  5. Tina Sieber
    June 18, 2013 at 8:47 am

    Sorry Adam, we do not allow direct downloads to suspicious software, which is probably shareware.

  6. Adom Watson
    June 17, 2013 at 7:05 am

    Exactly no free tools are available so far. As it is sure that ost converter application is required to do pst to pst file conversion if exchange server is no longer available. At this time, you should go with a feature-enriched and error-free application only. Directly download free edition of a product [LINK REMOVED to protect our readers] that is able to repair corrupt ost, recover deleted emails and convert ost into PST, EML & MSG formats.

  7. Beeman
    June 17, 2013 at 6:33 am

    yes indeed, the problem seems to be solved initially but i think you are again going with some 3rd party app..

  8. Phill Duplessis
    June 17, 2013 at 6:20 am

    Hello Raaja,

    Have a look on
    I think your problem will be solved.

    • Isa B
      October 19, 2013 at 9:12 am

      Hello Phill,
      I referred you but it shows it is not published. I don't know the reason about broken or might be it is happening at my end so please once check & correct it.
      Being as Outlook expert, i would like to explore about ost and pst file. Both files created by ms outlook. PST with pop3 and ost with exchange server. You can export the entire data into pst format from an ost file if ost file is opening and syncing with outlook & exange. However ost file is orphan or corrupt then need of any ost pst converter is very genuine but no freebies are available so far. Here is a project that elaborates about an ost pst convert & recovery process as well as about an absolute converter tool. Hopefully, it will help you all.

  9. Leland Whitlock
    June 17, 2013 at 2:37 am

    Below you will find a link to an article that may have what you need. It goes through the various options to convert them. Plus it lists some secondary tools that can be used to accomplish your task. Good luck with the conversion.

    • Tina Sieber
      June 18, 2013 at 8:46 am

      This article recommends all the tools we have banned from Answers.

      Shareware vendors have been spamming us systematically. They even post questions, just to follow-up with links to their shareware crap. This includes any software from Kernel, Stellar Phoenix, or Systools, to just name the worst offenders.

  10. Rajaa Chowdhury
    June 17, 2013 at 1:27 am

    None of them are truly freeware where I can save the OST to PST. They show the recovery preview, but all the version have the saving option disabled, until I pay. :(

  11. Bruce Epper
    June 16, 2013 at 11:49 pm

    If you remember your Exchange credentials for the file, you should be able to simply open it with Outlook (even without the Exchange server being available - after all, that is what the OST is for), create a new PST file, and copy whatever you want into it. Of course, this is assuming that you already have a copy of Outlook. You may want to create a new profile for the process so it has no chance of interfering with any other existing accounts if you are paranoid.

    • Rajaa Chowdhury
      June 17, 2013 at 1:18 am


      That would have been the easiest way, unfortunately my friend for whom I am doing this, cannot remember his Exchange credentials.

    • Tony Ross
      July 25, 2013 at 1:38 pm

      Outlook 2010 won't let the OST file be "opened" - it simply keeps saying that it isn't a mail file.

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