Free OST Viewer Tool

Get Services to Open Multiple Offline OST files using OST Viewer Freeware Software

Free OST Viewer Tool Features

Open Offline Outlook Data File Free of Cost & Without Exchange Server Environment

Free Download

Open OST files

Open OST files

The OST Viewer is a freeware, which allows the user to open items from offline Outlook OST file with all attributes
  • Open OST emails, contacts, calendar, task, notes
  • View OST file with attachments
  • Open orphaned OST file

View OST without Outlook

View OST without Outlook

The OST Viewer is an independent application i.e., it does not require MS Outlook or Exchange Server installation on the system for its use. The user can simply use the software & services to open OST file without Outlook or Exchange installation.

No File Size Limitation

No File Size Limitation

The software has been tested to open 32 GB .ost file, it could successfully open such large sized OST file without any data loss. Thus, free OST Viewer tool provides service to open & view OST files of Outlook without any maximum size limitation.

Free OST File Viewer Screenshots

OST File Opener Software to Read & View Emails From Offline Data File

Launch Software

Launch Software

Launch Software

Multiple view of emails

Video of Free OST Opener Utility

Learn to Use Offline Data File Reader Software by Watching Live Demo

System Specifications

Free OST File Reader Software For Viewing Emails From Exchange OST File

System Specifications

  • Windows OS : Windows 10 or any below version (32-bit or 64-bit)
  • Processor : 1 GHz Processor (2.4 GHz is recommended)
  • RAM : 512 MB (1 GB is recommended)
  • Disk Space : Around 50 MB free space for installation


Download Free OST Viewer Tool on your operating system. The Software would let you access or open & read mails as well as other data items from Microsoft Outlook OST file. But it won't let to save email attachements, for this you have to go for upgarde to Pro Version of tool or go for OST Viewer service.

Product Details
  • Version: 5.0
  • File Size: 18.10 MB
  • MD5: 7920bd60326278c1bd912f4146f604d7

Free Download

Frequently Asked Questions
Service Related User Queries & Solutions for OST File Viewer Software
What our client says...
Client Reviews About The Freeware OST Reader Software
Get Service To View Offline Outlook OST File

Services of Exchange OST Opener Tool to View Offline Outlook Data File Items like Emails, Calendars, Contacts etc.

For One OST File

Upto 500 MB



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For Multiple OST Files

Service by Expert Engineers

Secrecy of Information Shared

First We Analyze then We Quote

100% Data Security & Data Warranty

Expertise in Leading Edge Technology

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Rating & Reviews
Client Reviews About The Freeware OST Reader Software


4.5 out of 5 stars


5 star (23)
4 star (14)
3 star (3)
2 star (3)
1 star (0)

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Share your thoughts

Diane Smith


OST Viewer is good software for viewing all emails, contacts, calendars from orphaned or disconnected Outlook OST file. It is really an amazing tool, because i was able to view my data from a corrupted OST file too. Cause of this feature I have been a fan of this tool.

Carl Johnshon


I have used many tools for viewing emails from OST file, some of the tools were paid and some were free to use. But I found that the OST file Viewer is more effient and accurate software for opening OST file emails.