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OST Viewer Tool

Be it a healthy or inaccessible OST file, view them with complete details using this Free OST Viewer Tool.

Check Report


OST Viewer tool has plenty of advantages to offer to all users.

  • Scan and display OST file content like email, contacts, etc.
  • Access healthy, damaged, or corrupted OST files
  • Open OST files without MS Outlook/Exchange
  • No Exchange Server connection needed to access OST files
  • Save email data in HTML format
  • Compatible with all Windows systems, including Windows 365 and 11
OST Viewer Tool

Client Testimonials

OST Viewer

Discover what our clients say about their firsthand experience with this viewer tool.

Software Features

Learn about the remarkable capabilities of the Free OST Viewer tool, which enables you to access data from severely corrupted OST files effortlessly.

Exchange Server not required Exchange Server not required

The OST Viewer is crafted with a clear objective of no Exchange Server requirement. Once installed, you can select & scan OST files without an Exchange Server.

Detailed analysis reportsDetailed analysis reports

Access Outlook OST files while generating a comprehensive analysis report that provides details like email flow density based on various criteria.

Search for OST file itemsSearch for OST file items

The tool is enabled with the advanced search function, allowing you to find items within the selected OST file. Just check or uncheck folders and apply criteria like to, from, email IDs, or subject to find precise items.

Comprehensive file previewComprehensive file preview

This Free OST Viewer tool offers 2 viewing options- Simple and Advanced Properties. Simple View presents email previews along with attachments, while the Advanced Properties View lets you view the properties of an email.

Opens password protected fileAccess password-protected OST

This tool effortlessly opens a password-protected OST file, regardless of whether you possess the original Exchange profile.

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How it works?

View OST files in three simple steps with the tool. Let’s see how:



Learn about the software/hardware requirements before actually using this viewer tool.

System Requirements
  • Minimum Memory Requirement: 64 MB
  • Disk Space Requirements: 50 MB of Free Space
Supported Versions
  • Windows OS Platforms: Windows 365, 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT & 95
  • MS Outlook: Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98 & 97
  • Outlook Express: Outlook Express 6.0, 5.5, 5.0 & 4.0
  • MS Exchange Server: MS Exchange Server 2019, 2016, 2013, 2010, 2007, 2003, 2000, 5.5 & 5.0
Product Guides
& Licensing

Upgrade to

Corporate/Corporate Premium License

Save the OST mailbox data to PST, cloud or other destinations by upgrading the Free OST Viewer tool to Corporate or Corporate Premium License.

Software Features OST Viewer Home License question mark Corporate License question mark
Opens OST files without Exchange Yes Yes Yes
Searches OST files on a specified drive Yes Yes Yes
Detailed preview of OST file items Yes Yes Yes
Displays encrypted / protected OST files Yes Yes Yes
No OST file size limitation Yes Yes Yes
Works with multiple OST files at a time Yes Yes Yes
Saves the list of OST emails in HTML format Yes Yes Yes
Generates OST File Analysis Reports Yes Yes Yes
Converts OST files to PST   Yes Yes
Splits large OST files into many small PST files     Yes
Saves emails in DBX, MSG, EML, TXT/RTF, PDF, & HTML/MHTML     Yes
Saves OST data to MBOX files     Yes
Saves OST data to email servers (GroupWise / Exchange / Domino) & Office 365     Yes
Saves OST data to web-based email clients – Gmail, AOL, Yahoo, etc     Yes
Compatible with all Outlook/Windows versions Yes Yes Yes
Free Technical Support –24x7 (Phone, emails, & Chat) Yes Yes Yes
PST Outlook Repair Tool      
Repairs damaged PST files     Yes
Repairs large & encrypted PST files     Yes
Splits large PST files into small ones     Yes
Saves PST data to Gmail & other web mails     Yes
Saves PST file to email Servers (Exchange) & Office 365     Yes
Cost Download now Download Now Upgrade $69Purchase Now Upgrade $199 Purchase Now

OST Viewer


We have answered a few common queries about the Free OST Viewer tool.

The OST Viewer is a free tool by KDR tools to provide immediate assistance to users looking for a solution to view the content of their OST files. You can access even corrupt OSTs with this tool.

Being a free tool, OST Viewer does not require any license for activation.

Any OS change or upgradation in OS depends on whether the OST Viewer supports that version. Before modifying, read about the versions supported by the OST Viewer.

In case of any query, you can immediately contact our technical support team through phone or live chat software. Your response will shortly be prompted on your system screen once live chat is initiated.

User Reviews

and Ratings
OST Viewer
(4.9 / 5) 559 Reviews

Reviews 559

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1 2 3 > Last
29th September 2021 6:18pmM Doriega
I am delighted with the performance of the software. It helped me a lot to find out OST files. The support team is quick in response too.
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9th August 2021 1:53pmT Cooper
This software is able to open OST files without Outlook. I have done it successfully and want to recommend it to others too.
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30th April 2021 2:54pmJames
I downloaded this software to open an inaccessible OST file without Outlook. It worked for me. Thumbs up for the tool!
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4th February 2021 3:09pmS Nurian
This is undoubtedly one of the best and very user-friendly software to view OST files without Outlook. Thank you!
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1 2 3 > Last
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