How it works? Steps to open and view OST file

Kernel OST viewer is a software made specifically to open OST files. Users can scan the orphaned OST and preview complete data. With its simple interface, you can scan, view, and open OST file in 3 easy steps.

Kernel OST Viewer
Salient Features

There are various integral features associated with the OST viewer software that functions deeply for effective preview of all kinds of OST files.

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 the OST file and displays its entire content, including emails, calendar items, notes, contacts, etc.

Find and Open Emails

Find and open emails Use its integrated ‘Find’ option to access specific email items. In the selected mailbox folders, you can 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 You can save the selected email from the OST files in HTML format. It will save the email body that you can access in an offline manner. You can also check the related attachment of each email along with its message body.

Opens All Kinds of OST Files

Opens all kinds of OST files OST Reader tool is capable of opening orphaned, inaccessible, or corrupt OST files. The software is well-prepared to open OST file without connecting to an Exchange profile.

Search OST Files

Search OST files The tool makes finding OST files easier with the Search option. This option locates the OST file within the specified location. You need to enter the drive where your OST file is located. The tool will automatically fetch it, and you can open OST file 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 on the number of OST files to view. Use + button to add multiple OST files in the 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 The free OST Viewer tool generates reports with information on all item kinds, including emails, contacts, email flow density according to sender or data, notes, etc. It aids in the analysis of OST file data. These analysis reports provide a great deal about the OST file whose preview you have checked.

High Software Compatibility

High software compatibility Kernel OST Viewer Free tool extends support for all versions of MS Exchange Server (2019, 2016, 2013, 2010, 2007, 2003, 2000, 5.5, and 5.0), MS Outlook (Office 365, 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97).

What is an OST file?

OST file stands for Offline Storage Table, which is an offline copy of the Exchange mailbox. You can open OST file in offline mode and make changes to it. The changes made in the 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 in 2 ways.

Searching at the default location

Searching at the default location You will find the OST file at this default location- C:\Users\user\AppData\Local\Microsoft\Outlook Or C:\Documents and Settings\\Local Settings\Application Data\Microsoft\Outlook

Search option

With the Search option in the OST Viewer tool In OST Viewer tool, the Search option automatically extracts all the stored OST files from the specified drive in one go. To perform this, enter the drive location and click Search in the Source File Selection dialogue box. All the OST files are extracted at once, thus making the task of locating OST file convenient for users.

What is an OST file?

Opening OST mailbox items without Exchange profile/connection

  • Viewing orphan, corrupt, 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

Software Prerequisites & Recommendations

About Software

  • Version: 21.1
  • Release Date: Jan 2021
  • License Type: Free

Version Support

MS Outlook (Office 365, 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97)

Windows 365, 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, 95

System Requirements

  • Hard Disk

    50 MB of disk space

  • Memory

    64 MB RAM (128 MB Recommended)

  • Processor

    Intel® Pentium Processor compatible (x86, x64) or equivalent

Software Guides

FAQs - Kernel OST Viewer
Kernel OST Viewer is an easy-to-use software used to view inaccessible, damaged, or corrupted OST files in a few simple steps. Let’s check them out.
  1. Run the software, click the Browse button to select a single or multiple OST file(s), and click Next to proceed.
  2. The system will show you the Process Information; you need to click the Finish button there.
  3. In the next step, you need to click on the files you want to view. Select them one by one to view the content.

Note: You can also generate an analysis report. For this, you need to select the type of report you want to generate from the right corner of the screen.

You can configure an Office 365 account in Outlook using IMAP configuration. Then as the rest data is saved as a copy of mailboxes in an OST file, the configured Office 365 data is also copied into the local OST file.

OST file is an offline copy of the mailbox available on the Exchange. To access OST file with the latest information, synchronize it with Exchange. When the mailbox is permanently unavailable on Exchange Server, the OST file is termed as an orphaned OST file.

Yes. You can view the attachments in the OST emails. Here are the steps:
  1. Select the folder from the left pane
  2. From the right pane, select the email of the attachment you want to open
  3. In the email preview, double-click on the attachment.

You can use the Search option in the OST Viewer tool to find and open OST file easily by providing the drive location.

Using the File Analysis Reports feature; you can have the overall information about the content of the OST file. Let us have a look at the reports available.
  1. Total item types: Generates a graph between total item types and item count.
  2. Mail flow density by date: Generates a graph between Item count and date.
  3. Mail flow density by senders: Generates graph between Item count and senders.
  4. Interaction between users: Generates graph between Item count against Sender & Receiver pair.
What customers say about Kernel OST Viewer
rating5 (4.9 / 5) 544 Reviews
I am extremely satisfied with its performance.

I have tried various OST viewers, but this is hands down the best. It provided me with a clear and comprehensive view of my emails. Its efficient search capabilities and smooth navigation made the process hassle-free. I am extremely satisfied with its performance.

Melody Garcia
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