best ost to pst converter

Best OST to PST Converter 2020

In this article we will be talking about the best OST to PST converter which are available in the market right now. We’ll talk about what is an OST file?, different issues with OST files and why it is always recommended to use a third party OST Converter.

So what is an OST File?

The extension .OST stands for offline storage table. As the name suggest it is an offline folder file in Microsoft Outlook to store data items such as emails,tasks,calendar,contacts,messages etc on local user machine.

This allow users to access their data, edit or work on their data in offline mode or when there is no connectivity with the exchange server. However any changes made in offline mode will not be reflected on live exchange server account unless the connectivity is established again.

This feature is very useful in environment where the connectivity is limited or uncertain.

Problems with Outlook .OST file Face by Users

Users working with outlook .OST file face various problems some of which are:

  1. Application Pauses – Users may experience application pause sometimes while working with OST files. The reason for this pause of application file is caused due to large size of OST file. Larger the OST file more the application will pause.
  2. Error detected in .OST file – In Microsoft office 2013 or later version the user may get the following errors.
Errors have been detected in the file C:\Users\<name>\AppData\Local\Microsoft\Outlook\

This error usually comes when OST file get corrupted. The cause for corruption may be any hardware or software issue or can be any virus attack.

3. OST File is in use by another Application – This error is caused when OST file is terminated unexpectedly.

4. Microsoft Outlook not Responding – This issue is caused when Microsoft Outlook is not installed properly.

5. OST file cannot be Opened – This error comes when there is a problem in synchronization between OST file and exchange server.

Why use Third Party OST Converter Software?

Whatever may be the cause for error your data is always at risk whenever you are working with offline storage table(OST) file. You may resolve the issue somehow but you may not be able to retrieve the data back which you have updated on the OST file.

In such situations third party best OST to PST converter tool comes in handy as not only they are able to repair the OST file but also helps to convert OST file into Different file formats which is very useful for taking backups, reducing size of OST file and for exporting data.

Top Best OST to PST Converters

Some of the best OST to PST Converters which are very useful for repairing and Converting OST file to different file format.

1) OST to PST Converter

password recovery software

stella has been for a long time in data recovery industry and being one of the oldest company, it is one of the well recognized company for developing quality data recovery software.


  • Fix OST Errors
  • Show preview of OST mails
  • Split large size OST upto 5gb
  • Conversion of OST file to MSG,HTML,MHTML, MBOX, RTF, TXT, MS outlook profile, DOC, PDF
  • Support all versions of MS outlook both 32 bit and 64 bit

2) Stella OST to PST Converter

password recovery software

Stella has variety of products for different kinds of scenarios and has one of best OST to PST converter tool and is a well know names in data recovery industry


  • Export ost to file formats such as MSG,HTML,MHTML, MBOX, RTF, TXT, MS outlook profile, DOC, PDF and office 365
  • Convert single or multiple OST files at a same time
  • View Preview of OST File conversion
  • Support all Version of MS Outlook both 32 and 64 bit
  • Demo version allows to export upto 30 items

3) Dux OST to PST Recovery Software

password recovery software

Though somewhat new, Dux is another emerging name in the data recovery industry and has some good software which matches the industry standards.


  • Convert OST file to PST, EML, MSG, DOC, EMLX, and HTML & MBOX
  • Single or multiple file conversion at same time
  • Preview email conversion
  • Demo version allows conversion of 25 items

conclusion: All the above mentioned software are the best OST to PST Converter with each having their own advantages and disadvantages.It all depends upon user with which best OST to PST Converter they want to go with.

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