Full conversion of OST file into PST

Offline Outlook Data (OST) files reside on user computers. When Exchange Server is down, users can convert these OST files to PST format to access their Exchange mailbox data. In such situations, the manual methods may not be capable of converting the OST data. But the Convert OSTto PST tool can extract all the content of the mailbox including emails, contacts, & calendar, and save them to PST or any other desired destination.


  • Converts large/corrupt OST files

    The tool can convert very large as well as damaged OST files to PST format. It converts the OST data in the same hierarchical manner without altering the layout or format of the emails and other items.

  • Clear preview of OST items

    You can have a complete and clear preview of OST data and thereby be sure of its conversion even before saving them. The tool recovers also deleted items, and displays them in red color.

  • Saves in multiple formats & targets

    It can directly export OST file data to Office 365, Exchange Server, GroupWise, and Lotus Notes. The OST emails can also be exported to multiple web-based email apps like Gmail, Yahoo, AOL, Hotmail, iCloud etc. Also, there are multiple file formats available for saving individual emails - DBX, MBOX, EML, RTF, MHTML, PDF, etc.

Free Download

Salient Features of the OST to PST Converter

OST file search option

If you are not aware of the location of corrupt OST file, then leave it to the OST to PST converter tool as it has an advanced in-built ‘Search’ option which can find OST file from any given folder or drive.

Rescues PST files from disaster

Converts without Exchange profile

OST files are linked to Exchange profiles. But while using the Convert OST to PST tool, you can convert OST files without the original Exchange profile or server connection.

Inbuilt PST search option

Protects data integrity

The tool maintains the integrity of OST data and maintains its structure, hierarchy, and format. The email messages retain their meta properties like from, To, Cc, Bcc, Subject, Send Date, & Receive Date. So the original OST data is not altered in any way.


Extracts encrypted information

Converts large OST files

Large-sized OST file are problematic, and our tool can save even large OST files into multiple, small PST files. You can split the PST file after a certain size limit in gigabytes (1, 1.5, 2, 2.5, 3, 3.5, etc.).

Advanced saving options

Generates OST file analysis reports

The tool provides complete information about the content of the OST file with the help of multiple graphical analysis reports based on four criteria –Mail flow density by date, Total item types, Interaction between users, and Mail flow density by senders.

Supports all Outlook versions

Supports all versions

The tool supports all Outlook versions ranging from Outlook 2019 to Outlook 97 and it can be run on any Windows version including Windows 10.

Recovery Procedure
  • 1

    Run the software, and select the OST file by browsing or using the search option.

  • 2

    Preview the OST data, and filter the content as per need (by To/From, Subject, Folder Name, Item Type, & Date Range).

  • 3

    Select a file format or destination from the list and save the file data.

Software FAQ
Ans: Outlook does not include scanost.exe tool since Outlook 2010. However, you can still use scanpst.exe tool which is quite capable for handling OST file issues. However, it has many limitations.
Ans: There can be multiple reasons behind the inaccessibility of OST files like physical, logical, & network errors.

Physical errors –
  1. Corruption in hard drive sector where OST file is saved.
  2. Sudden power loss.
  3. Accidental deletion.
Logical errors –
  1. Faulty Outlook Add-ins.
  2. Incompatibility with Outlook program.
  3. Virus attack.
  4. Unauthorized access.
Network errors –
  1. Faulty network hardware.
  2. Slow internet connection.
  3. Internet connection lost while transferring the data.