OST Export Fully-Featured OST Export Utility to Backup Offline OST file to multiple formats

  • Extract mails from OST file to PST, PDF, EML, EMLX, MBOX, Zimbra, NSF, Office 365 etc.
  • Batch convert unlimited Offline OST files at once
  • Import complete data from OST file – emails, contacts, calendars, journals etc.
  • Excellent solution to export inaccessible, corrupt, orphan OST files
  • Separate option to convert OST contacts and calendars to standard formats
  • Maintains complete data integrity during OST export processe
  • Saves Read/Unread status of emails precisely
  • Date filter option for selective data migration
  • Allows conversion of Outlook.bak files without error

* Download FREE demo edition of the software to know how to extract emails from ost file free. Evaluation copy of the software allows to extract email from ost free, but with the limitation of first 20 items from OST file to supported formats.

OST Converter to backup offilne OST file to different applications.
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OST Converter – Features and Benefits

bulk export OST files

Export unlimited OST Files in Batch

OST Export utility is designed to convert unlimited OST files at once. The software provides option for selecting multiple OST files and converting all of them to the desired format, in single cycle. The option is beneficial for users as it helps them in saving their precious time and efforts.

backup offline OST file in differnt mail apps

Move Outlook Data file OST to Multiple formats

With OST Converter, users can now convert and access their OST files in multiple formats. The software, very precisely extract data from Outlook .ost file to PST, PDF, EML, MBOX, EMLX, MSG, DOC, HTML, RTF, NSF, Zimbra and O365. Moreover, there is no need to worry about the accuracy of the data as the software keeps all the Meta headers, formatting and all other details retained in perfect manner.

move Outlook 2016 OST data file including emails, contacts, calendars, etc.

Complete conversion of all Exchange items

An OST file consists of complete Exchange data which includes emails, contacts, calendars, notes, tasks, journals etc. The software provides assured migration of entire Exchange items contained within OST files, without any data loss or alteration. Moreover, the tool supports migration of OST contacts and calendars to their standard formats, i.e, vCard/CSV and ICS respectively.

OST Converter support .bak files conversion too

Convert Outlook.bak files generated via SCANPST.exe

Outlook offers in-built tool to repair corrupted and inaccessible OST files, which creates a new file with .bak extension. This OST Converter software is capable of converting these .bak files with complete efficiency. Just rename the .bak files with .ost extension and convert them to any format as you desire.

easily extract data from Outlook .ost file

Provides Ease of Use

The graphical user interface of OST Converter is so simple that it is easy to use for all users. Now both technical and non-technical users can effortlessly convert their Offline OST files, without any technical support.

extract mails from OST file without Outlook installation

No need for Outlook installation

The software is fully capable to work efficiently without even installation of Outlook and any other application. It’s a completely independent utility and is not relied upon any other app installation.

Split output file for better management

OST Export software provides splitting option to break the output files into specified file size in MB or GB. Splitting option makes data more manageable for users, and thus is a very useful feature provided by the software.

move an offline Outlook data file (.ost) 2016 with multiple file naming options

Save data with different file naming options

With OST Converter, users also get the benefits of saving their resultant files with multiple file naming conventions. With this option, one can save output file according to the pre-defined options – Subject, Subject + Date (DD/MM/YYYY), Date (MM/DD/YYYY) + Subject + From etc.

Option to Ignore System Folder

An OST file consists of System folders (both IPM subtree and Non-IPM subtree) and User folders (Inbox, Outbox, Sent Items, calendars, contacts, deleted items etc. Many users want to save only user folders data and OST Converter provides them with the option to ignore system folder while migrating OST files to supported formats.

move an offline Outlook data file (.ost) 2016 with multiple file naming options

Option to filter data using Date Filters

Many times users need to convert and save data from OST file occurred between certain time periods. The software provides date filter option that allows conversion of OST files with specified date ranges.

OST Export Tool supports all Windows and Outlook versions

Retains Read/Unread status of emails

Keeping the read/unread status of emails intact is foremost priority of users while viewing their data in some application. And the software is designed is such a way that it helps them get the read/unread status of all the message retained in as is manner.

OST Export Tool supports all Windows and Outlook versions

Widely compatible software

The software is widely compatible with all Windows and Outlook editions. Use the application on all Windows (32bit and 6bit) editions – 10, 8.1, 8, 7 etc. Moreover, users can move an offline Outlook data file (.ost) 2016, 2013, 2010 and all below editions into different applications supported file formats.

Screenshots – OST Export Utility

OST Converter is a complete conversion software that allows to open or import items from an offline Outlook data file (.ost) 2016, 2013, 2010 and etc. into different usable options. To know more about software working and its appearance, follow the below screenshots displaying complete OST conversion procedure.

add OST files

Step 1 : Add OST files and preview them before starting with the OST migration process

choose desired output format

Step 2 : Select output option to export Outlook OST files to supported formats

view OST conversion status

Step 3 : Software will start the conversion process showing the complete migration status

Working process of OST Converter

Step 1 - Launch the software on your PC and add OST files

First install OST Converter on your Windows system and add OST files using Add Files or Add Folder options.

Start OST Export Tool
Step 2 - Preview OST files before initializing conversion procedure

Once the OST files are added on the software panel, you can preview them before starting the actual process to migrate Offline OST files.

Preview added OST files before starting conversion
Step 3 - Click Export and Choose desired output format

Once you click on the Export button, the software will display a number of output options for exporting OST files. Choose the desired option and its subsequent sub-options before initializing the conversion process.

Choose output option to save resultant files
Step 4 - Choose destination path and start OST migration

After selecting the output option, select the destination location where you want to save the resultant files and start OST export process.

browse data saving location and finally initialize OST conversion procedure.

Frequently Asked Questions about OST Export Tool

What will happen to my OST files after conversion ? Will the software make any changes or deletes them?

No, the software will not delete or make any alterations to the integrity of your OST files. The software only extracts data and maintains that each and every data item along with other OST properties their folder structure are kept in original form, as they were before conversion.

I have a few .bak files which I want to access in Thunderbird. I was wondering if this software is capable of doing that?

Absolutely yes, you can easily convert all your .bak files into your desired application without any problems. Just rename your .bak file with the extension .ost and this OST Converter will successfully recognize and convert entire data from this OST to the supported format.

What data is the software capable of converting?

The software is capable of converting entire mailbox items from Exchange offline OST files, which includes emails, contacts, calendars, tasks, notes, journals etc.

What is the difference between orphan and offline OST files ? Will this software convert these two types of OST files?

Absolutely yes, OST Export Tool is capable of converting orphan, offline and inaccessible OST files with complete efficiency. Basically orphan OST files are created in situations when they are not available in their original Exchange environment. Once they are disconnected with their Exchange server, these files become more vulnerable to corruption, mainly due to hardware/software failures. Offline OST file, on the other hand, gets created when the option “Cache Exchange Mode” is enabled in Outlook. Don’t worry, the software is designed to convert all types of Offline, orphan, corrupt and inaccessible Outlook OST files to supported formats.

Can I use the software without even connected with the Exchange server?

Absolutely yes, the software doesn’t need a user to be connected with Exchange server for converting OST files.

Is the software capable of converting large sized OST files without interruption?

Absolutely yes, OST Converter is capable of converting large number heavy sized OST files without any problems and interruption.

How can I be assured about the working of this software?

You can download FREE trial edition of the OST Export software and get it evaluated before purchasing the licensed edition. With FREE demo edition, you are allowed to convert first 20 items from OST files to your desired output option.

Requirements & Specifications - OLM Data File Converter

Stars Rating of OST Converter
Rated 4.8/5 based on 35 customer reviews
Program name CubexSoft OST Export
Version 1.0
File Size 24.0 MB
Program Type Shareware
System Requirements Pentium II 400 MHz, 64 MB RAM, Minimum 30 MB Space
Operating System All Windows (32bit and 64bit) editions.

Trial Edition

With OST Converter freeware download edition, users get complete understanding about its working capabilities. Free edition works just like the licensed edition, but provides limited conversion of first 20 items from OST file to the supported format. For performing unlimited files migration, purchase the full version of the OST Export Tool.

Comparison v/s Demo & Complete Version - OLM Exporter

Features FREE Version FULL Version
Add OST Files
Preview OST Emails with Attachment
Compatible with entire Windows OS
Split Output file by Size
Save OST Files First 20 emails
Cost FREE $49
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Testimonials Customers Views About OLM Export Tool


"Converting my Offline OST files was the toughest job of my life until I found this OST Converter. This tool really helped me in exporting all my OST files at once. Moreover, it provided me with complete conversion of emails, contacts, calendars and other data items from OST files into multiple formats."

Jack J. Thorn |Springfield, USA 

"This OST Converter is a fantastic tool really made accessing of my Orphan OST files in Outlook an easy task. It’s an outstanding solution that not only supports batch migration but also maintains that nothing is lost or changed in between. Thank you CubexSoft team for developing such a remarkable software. "

Eliza Blom |Amiens, France