Kernel OST Viewer - It’s free

Kernel OST Viewer

Opens healthy & corrupted OST files without MS Outlook

  • Opens OST files without Exchange account/MS Outlook
  • Displays emails, attachments, Deleted Items, Calendar, Contacts, etc
  • Works with healthy & corrupted OST files
  • Allows to copy & print email list in HTML Format
  • Creates a comprehensive file analysis report to analyze OST data
  • Owns user-friendly Graphical user interface
  • Compatible with all Exchange and Outlook versions.
  • Can be installed on all Windows workstations
  • Is completely FREE for all users


Simple steps to view OST files without MS Outlook

The Free OST Viewer has an easy-to-use & interactive GUI that helps in opening OST files much easier.


  • When the software is launched, the Select Source OST File dialog box appears and prompts to browse the OST file that one wants to open.
  • Then, select the OST file and click the OK button (use the Search option to get the location of OST files in a drive).
  • After clicking the OK button, the utility starts scanning the selected file.
  • On the successful completion of the scanning procedure, the software displays the email items in a tree-like structure in the left panel.
  • User can navigate through the folders listed in the left panel to view the desired emails, Contacts, Calendar Items, Sent Items, and so on.
  • To save the OST email list, click Save list information to HTML file button.
  • To generate OST File Analysis Reports, click the reqired report type on the righrt pane. Then select the required folders and click Analyse. The OST file Analysis Report will be generated instantly.


Features of Kernel OST Viewer Free Tool
Access OST files without Exchange Server

OST Viewer tool allows access to Exchange Offline folders file (OST) without establishing a connection with MS Exchange Server. The tool scans OST file and displays its entire content including emails, calendar items, notes, contacts, etc.

Copy and Print emails

OST Viewer tool not just makes healthy or corrupt OST files accessible without Exchange Server, but allows you to copy and print emails in TXT and HTML formats also. The tool also provides access to email attachments in a single click.

Opens all kinds of OST files

OST Viewer tool is capable of opening healthy as well as corrupt OST files. The tool is even capable of opening password-protected OST files with equal ease even if the password is not known to you.

Generates file analysis report

Free OST Viewer tool creates an inclusive report having details of all item types such as emails, contacts, email flow density as per sender or data, notes etc. It helps you analyze the OST file data.

Easy to operate

Kernel OST Viewer carries an interactive and user-friendly Graphical User Interface (GUI) which make it quit easy to operate. All its features are self-explained. Any kind of assistance is not required to operate the software.

High software compatibility

Kernel OST Viewer Free tool extends support for all versions of MS Exchange Server (2016, 2013, 2010, 2007, 2003, 2000, 5.5, and 5.0), MS Outlook (2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97) and Windows OS (10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, and 95).

Process to View OST File

Kernel OST Viewer is coded with easy-to-select features that helps in accomplishing the job of previewing the OST files. This portable software runs exhaustively while securing the crucial OST email properties, structure, and formatting. View the following snapshots:

Locate and attach the required Outlook OST file to fetch preview.

Locate Outlook OST file

Unified preview of Outlook OST folders and files.

Preview of Outlook OST folders and files

Visual reports on “Total item types” for the selected OST folder.

Visual reports for selected OST folder

User Reviews & Ratings (22)

I was suffering bad time due to inaccessible OST files, these OST files were orphan, and I had to analyze them, but due to limited access it became a difficult task. Finally, I came through OST viewer software that allowed me to open and read these OST file items and also exported them to different file formats such as TXT format.
This tool helps me a lot in viewing my damaged ost files when I am unable to access them. Thanks a lot.
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For past many days, my Outlook application was not working properly and any new changes were not reflecting. Only when I used the OST Viewer tool, then i was able to access the OST file's content and get a clear picture of past data.
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For me, this tool is my savior because I was unable to access my OST files, but this tool helps me accessing my OST files, and there is no need to have Exchange connection. I am happy I can access and use my OST files without an Exchange server.
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