How to Open OST File without Outlook?

Ritu Roy | Cloud Backup Email Conversion File Repair How to's Outlook Software Technology | 5 minutes read | Last updated on February 8th, 2023,

The term Outlook OST is gaining popularity rapidly across the world. OST is known for storing the copy of Exchange mailbox data. It is created when a user is accessing Outlook without connecting to Exchange Server environment. In spite of having a situation of maintenance or server downtime, still users can continue to work with OST file without facing any interruptions. Moreover, everyone is also quite aware that .ost files are susceptible to corruption due to which they become inaccessible. If such type of trouble occurs, then first thing you need to do is to use Microsoft in-built ScanOST utility. However, sometimes the tool fails to repair the issues within OST file and leave users in the lurch.

Thus, if OST users face any issues, it is better to move OST files to Office 365, Exchange Server, IMAP Server, AWS, Thunderbird, WLM or any other cloud/desktop account directly. Therefore, the segment has focused on the solution of how to open OST file without Outlook and why it become necessary for users.

Why to Open OST File without Outlook?

Before being indulge into depths of matter, it is always better to analyse the necessity first. Apart from ScanOST utility to repair OST file, below are some other situations too that requires backup of OST file:

MAPI Bindings

Usually, OST files are limit to particular MAPI profiles. Therefore, a user can open OST files in an environment where MS Exchange account was configured with cached mode enabled. So, if you want to access OST data on a different system, then a simple copy-paste task will not do that process. You will need to take backup of OST file into a different account where no supported program is required to open and view OST data.

OST Size Limit

With continuous over time use, OST files starts increasing its size. However, they are not able to deal with large volume of data. Moreover, as their size increases, they likely to get corrupt. Thus, from time to time, archiving old OST data to cloud is a good way to keep OST file safe.

Orphan OST

If account of MS Exchange Server is a parent of OST file and it is deleted, is inaccessible or handling any technical issues, in such a case OST file is considered as Orphaned. Repeatedly attempts to access the file could result in errors. Thus, it is better to move OST file data to cloud before any disaster happens.

How to Open OST File without Outlook?

It will be better for users to backup OST file to cloud due to its ease of accessibility and platform-independence. Storing data on cloud can help users to open, view and edit the content from any location at any time. Moreover, there are manual methods available with complex steps that can operated by only technical users. Thus, experts launched free to use and cost-effective for lifetime validity OST Converter Tool.  Follow the steps and check how to open OST file without Outlook:

Step 1. Download and run the application on any Windows PC.

launch ost converter tool

Step 2. Go to Select File(s) and use Add Files, Add Folders or Load Outlook Profiles option to load OST data files or folder on software window.

add OST file

Step 3. The tool start scanning the selected OST file and list all its associated folders with checkboxes on the left side of application window. The checkboxes can be selected as per need for selective conversion.

select data items of OST

Step 4. Navigate to drop-down arrow of Saving Options and choose the desired cloud option from multiple selections.

choose saving option

Step 5. A window will appear, asking to enter the login details of chosen cloud account. Simultaneously apply sub-options as per need to save .ost file as per requirement.

set options

Step 8. Click on Convert to start the process. Once the backup process is completed, an alert message will appear on the screen “Conversion Completed Successfully”.

process completed

By utilizing the steps correctly, a user can easily open OST file without Outlook email application in an easy way.

Main Software Features

Direct Solution

The application is a direct and error-free method to open OST file without Outlook. After selecting a required cloud account, a user only need to enter the login details of that particular account and the tool will then directly transfer .ost data to required cloud environment.

Multiple Cloud Options

The software not only includes one option for saving Outlook Offline .ost files into cloud. It provides heaps of cloud saving options to access .ost files into different webmail accounts. You can select the desired one and achieve the process without facing trouble.

Load OST Files or Folder

The tool provides three options that can help to add .ost file on a software window. Clicking on Select File(s) will show three sub-options i.e. Add Files, Add Folders or Load Outlook Profiles. Add Files can help to load required .ost files. Add Folders enables to add entire folder of OST and Load Outlook Profiles will help in directly loading the file from the account.

Offers Other File Formats

With cloud saving options, the application also offers other desktop file types to open OST file without Outlook email client. With the help of the utility, a user can retrieve OST file data into PST, PDF, MSG, EML, MBOX, MHT, HTML, DOC, RTF and more.

Avail Change Language Option

By enabling the checkbox of Change Language option, a user is free to perform the process in any kind of language. It includes Dutch, Spanish, French, German and more. It is one of the remarkable feature that makes the software a no.1 in today’s list.

Runs on all Windows OS

The software is capable to run on all versions of Windows OS and Windows Servers. One can download and operate the working of the tool on Win 10, 8.1, 8, 7, XP, Vista and more. It supports both 32-bit and 64-bit Windows editions.


The write-up is discussed so that a user can gain a solution for how to open OST file without Outlook. The blog has provided an appropriate, reliable and secure method that can help in direct migration of OST file to cloud. Because data stored on cloud does not required any application to be opened, viewed or edit. A user can access data from the same at any time and from any location. Download freeware edition of the tool now that allows to backup first 25 OST files to cloud.