Kernel OST Viewer - It’s Free

Kernel OST Viewer

This tool generates free preview of all OST file items including emails, calendar, deleted items, attachments, contacts etc. OST reader tool supports viewing healthy & corrupt OST files. Along with it, the software allows opening email and attachments.

  • Opens OST file(s) without Exchange account/MS Outlook
  • Displays all OST items including emails, attachments, Deleted Items, Calendar, Contacts, etc.
  • Works with healthy & corrupted OST files
  • Allows to Copy & Print the OST email list in HTML Format
  • Find Specific OST email items
  • Creates a comprehensive file analysis report to analyze OST data
  • Owns user-friendly graphical user interface
  • Compatible with all Exchange and Outlook versions
  • Opens OST email attachments
  • Completely FREE software for all users


Kernel OST Viewer Free Software Features
Access OST Files Without Exchange Server 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.

Find and Open Emails Find and Open Emails

With OST Viewer tool, you have the privilege to access particular email items with ‘Find’ option. In the selected mailbox folders, you filter the emails by From, To, Subject, Date Range, Attachments, etc. Thus you can locate and preview specific emails.

Saves Email List in HTML Saves Email List in HTML

The OST Viewer tool allows you save the list of OST emails in HTML format. You can copy or print this list. The tool also provides access to email attachments in a single click.

Opens All Kinds of OST Files Opens All Kinds of OST Files

OST Reader tool is capable of opening healthy as well as corrupt OST files. The tool is capable of opening OST files without an Exchange profile.

Search OST Files Within Disk Drives Search OST Files Within Disk Drives

The tool makes the task of finding OST file easier with the Search option. This option locates the OST file within disk drives. You just need to enter the drive in which you know your OST file is located. The tool will automatically fetch the OST file located in the mentioned drive and you can open it by clicking on it.

Open Multiple OST Files Open Multiple OST Files

You can open as many OST files as required. There is no restriction in number of OST files to view. You can add multiple OST files with the + button in Source File Selection dialogue box. This feature saves the users’ time from adding individual OST files one-by-one.

Generates File Analysis Report Generates File Analysis Report

Free OST Viewer tool creates reports 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.

High Software Compatibility 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).

FAQs - Kernel OST Viewer
OST Viewer Tool – What’s it for?
  • Opening OST mailbox items without Exchange profile/connection
  • Viewing orphaned, corrupted and healthy OST files without Outlook
  • Viewing email data by Date, From, To, etc.
  • Viewing attachments of OST file emails
  • Saving OST email list in HTML format
  • Viewing analytical reports on OST file content

By reading the above points about the tool, 2 questions may arise in our mind

What is an OST file?

OST file stands for Offline Storage Table which is an offline copy of the Exchange mailbox. You can make changes in OST file content in offline mode. The changes made in OST file will get automatically updated by synchronization when connected with Exchange Server.

Where is the OST file located?

OST file can be found without opening Outlook/Exchange by 2 ways

1.Searching at default location

You will find the OST file at this default location - drive:\Users\user\AppData\Local\Microsoft\Outlook


drive:\Documents and Settings\\Local Settings\Application Data\Microsoft\Outlook

2.With Search option in OST Viewer tool

In OST Viewer tool, Search option automatically extracts all the stored OST files from the specified drive at one go.

To perform this, enter the drive location and click Search in Source File Selection dialogue box. All the OST files are extracted at once, thus making the task of locating OST file convenient for users.

Open OST files without Exchange or Outlook with these steps

The Free OST Viewer has an interactive GUI that helps in viewing OST files much easier.

  • Launch the free OST Viewer application. In the Source File Selection dialog box, browse the OST file that you want to open. Source File Selection dialog box
  • Then, select the OST file and click the OK button. Select the OST file
  • Note: You can use the Search option to get the location of OST files in a specific drive. 'Search option' to get OST file location
  • Once scanning procedure is completed, mailbox folders are displayed in the left panel in a tree-like structure. Mailbox folders are displayed
  • User can navigate through the folders listed in the left panel to view the content of the desired folders Inbox, Contacts, Calendar Items, Sent Items, and so on. View the content of the desired folders
  • To save the OST email list, click Save list information to HTML file button. Save the OST email list
  • To generate OST File Analysis Reports, click the required report type on the right pane. Then select the required folders and click Analyse. Click the required report type
  • The OST file Analysis Report will be generated instantly. Generate OST File Analysis Reports

User Reviews & Ratings (143)

OST Viewer
(4.6 / 5) 143 Reviews
The trial version offered is very advantageous as it gives the overall experience of the offered features and made me decide to buy the software for the issues I was facing. You are a true performer in the industry, thank you so much.
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I have never seen such quick delivery of the product and easy registration. Excellent services provided that can be availed sitting at home.
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Dear ladies and gentlemen! Many thanks for the quick support and amazing technical skills.
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