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Downloads of v 4.1:


Last Update:

12 Nov 2016

Package Maintainer(s):

Software Author(s):



ost2pstware ost pst reader outlook exchange admin

Free OST Reader (Install)

  • 1
  • 2
  • 3

4.1 | Updated: 12 Nov 2016



Downloads of v 4.1:



Software Author(s):


Free OST Reader (Install) 4.1

  • 1
  • 2
  • 3

Some Checks Have Failed or Are Not Yet Complete

Not All Tests Have Passed

Validation Testing Passed

Verification Testing Failed


Scan Testing Successful:

No detections found in any package files

Learn More

Deployment Method: Individual Install, Upgrade, & Uninstall

To install Free OST Reader (Install), run the following command from the command line or from PowerShell:


To upgrade Free OST Reader (Install), run the following command from the command line or from PowerShell:


To uninstall Free OST Reader (Install), run the following command from the command line or from PowerShell:


Deployment Method:


This applies to both open source and commercial editions of Chocolatey.

1. Enter Your Internal Repository Url

(this should look similar to https://community.chocolatey.org/api/v2/)

2. Setup Your Environment

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

2. Get the package into your environment

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to https://community.chocolatey.org/api/v2/. Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Copy Your Script

choco upgrade free-ost-reader -y --source="'INTERNAL REPO URL'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:

choco upgrade free-ost-reader -y --source="'INTERNAL REPO URL'" 

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0

Exit $exitCode

- name: Install free-ost-reader
    name: free-ost-reader
    version: '4.1'
    state: present

See docs at https://docs.ansible.com/ansible/latest/modules/win_chocolatey_module.html.

chocolatey_package 'free-ost-reader' do
  action    :install
  source   'INTERNAL REPO URL'
  version  '4.1'

See docs at https://docs.chef.io/resource_chocolatey_package.html.

cChocoPackageInstaller free-ost-reader
    Name     = "free-ost-reader"
    Version  = "4.1"
    Source   = "INTERNAL REPO URL"

Requires cChoco DSC Resource. See docs at https://github.com/chocolatey/cChoco.

package { 'free-ost-reader':
  ensure   => '4.1',
  provider => 'chocolatey',
  source   => 'INTERNAL REPO URL',

Requires Puppet Chocolatey Provider module. See docs at https://forge.puppet.com/puppetlabs/chocolatey.

4. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.


Private CDN cached downloads available for licensed customers. Never experience 404 breakages again! Learn more...

Package Approved

This package was approved by moderator gep13 on 14 Nov 2016.


Screenshot of Free OST Reader

Salient Features of the Software

  • An easy to use tool to View Outlook Offline mailbox data files*
  • Preview Option available for both Messages and Attachments
  • Displays all items such as task, journals, calendars etc., perfectly
  • Opens orphan .ost data files of Outlook
  • Reads both ANSI and UNICODE .ost data file format
  • Provides View of all types of OST file - Encrypted, Highly Encrypted, and Compressed

Free OST Viewer Tool

It is completely freeware, without paying a single buck you can use the tool to view and read Outlook offline mailbox data files. You don't need to waste money on expensive software just simply download for free and access your OST files.

Display Proper Information

Advantage of using OST Viewer is it help you to read all important informations related to your files in a proper way. Every minute detail is showed to you without creating any complexity to understand the data. It is a completely full featured program.

Easily runs without Outlook

The special feature of this OST Viewer program is that you can get access to your OST file at the situations when you don't have Outlook installed on your system. Also, OST Reader made browsing of Outlook offline data files possible even when exchange server is down.

Retain Folder structure

You will not face any difficulty using this OST Viewer utility. It will give you view of Outlook offline Mailbox data files as same as in Outlook. You will see same folder and sub folder structure, even the message formatting is not affected. All read and unread message status is maintained.

Preview Option - Dual

You can easily get preview of any messages or attachments in the same screen in a proper manner. There are two sections: One displays all items of selected folder the other shows you preview. It contains two tabs one to preview selected message other shows its attachment

Supported by Windows

It is windows based software. You can download it on any version of Windows Operating System. It runs perfectly on Windows 10, Windows 8.1 Windows 7, Windows XP, Windows Vista and all previous version

Simple GUI

Its graphical user interface is created very simple. Any kind of computer user can use the tool comfortably without requiring any assistance to run the free OST viewer. To open OST file without Outlook you just need to click on Add file and browse OST file, software will load all data of selected OST file

Opens Orphan OST

It is a special program developed to open and read OST files without Outlook. There are many situations when you can't access OST files such as at down time of Exchange Server, or MS Outlook not installed or when OST becomes orphan. In such cases you can easily open and explore OST files using OST Viewer

$ErrorActionPreference = 'Stop'
$packageName= 'free-ost-reader'
$softwareName = 'Free OST Reader*'
$installerType = 'EXE'
$toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"
$url        = 'http://ost2pstware.com/dl/free-ost-reader.exe' 
$checksum   = '02038176EAB1C2B09A9528564489D126C7C7FBF7E15BC1930AF5E2DC083659F5'
$validExitCodes= @(0, 3010, 1641)

$packageArgs = @{
  packageName   = $packageName
  fileType      = $installerType
  url           = $url
  validExitCodes= $validExitCodes
  silentArgs    = $silentArgs
  softwareName  = $softwareName
  checksum      = $checksum
  checksumType  = 'sha256' 

Install-ChocolateyPackage @packageArgs  

Log in or click on link to see number of positives.

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.

Add to Builder Version Downloads Last Updated Status

This package has no dependencies.

Discussion for the Free OST Reader (Install) Package

Ground Rules:

  • This discussion is only about Free OST Reader (Install) and the Free OST Reader (Install) package. If you have feedback for Chocolatey, please contact the Google Group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or Free OST Reader (Install), or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
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