I was having a lot of trouble in accessing the data stored in my OST file. I searched various websites online for a solution to my problem. After countless searches, I am happy that I finally found this all-in-one OST converter software. It assisted me in quickly converting all of my OST file data to the required format. Thank you very much!
4n6 Software
OST Converter Tool
Convert Outlook OST Files into 13+ Formats Quickly and Securely in A Few Steps
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- Convert multiple Outlook OST files in batch to save and reduce manual efforts
- Convert all OST data including emails, contacts, calendar, tasks, etc.
- Export OST files without requiring Microsoft Outlook installation on your Windows
- Preserve original folder hierarchy, email metadata, headers and attachments
- Supports to convert orphaned and inaccessible OST files with high accuracy
- Allows previewing OST mailbox items before exporting to desired platform
- Advanced search options to locate specific emails and items within large OST files

Complete Data Integrity with Advanced Export Control
This toolkit ensures that every mailbox component is preserved accurately during OST file conversion. With this software, all your emails, attachments, headers, metadata, contacts, calendar, tasks are exported with original formatting and properties intact. It’s safe and reliable for legal and professional use.
What makes this tool powerful?
- Maintains email headers, timestamps, and sender/receiver details.
- No alteration to original OST data, offers read-only processing.
- Advanced filters for selective export by date, item type, or keywords.
- Supports to view OST files before final conversion.
Software Features
4n6 OST Converter Tool Explore the Main Features
Convert Outlook OST Files in Batch
4n6 OST Converter Software is the most reliable, fastest and easiest solution for users to convert OST files. The application offers tons of advanced and attractive features for accurate and fast conversion. Batch conversion is one of them. With the help of batch conversion tool, you can easily export multiple OST files to another platform simultaneously. Now, there is no need to browse and select OST files one by one to perform conversion. So, if you are in need to convert OST files without wasting time, it is a right solution for you.
Export OST Email Data with Headers
This OST converter tool is developed to cater to all needy users at the same time. With this solution, you can easily convert complete OST file data without losing any information. The application successfully supports converting OST emails, contacts, calendars and other data. Apart from this, it also allows you to convert OST file data including header information. OST conversion software provides an option that allows you to convert OST files containing header information. This feature is very helpful for forensic investigators.
Dual Mode Feature of OST Converter Tool
OST Converter tool allows users to access the OST Data files in the following two ways:
- Open Configured Outlook OST Files: This preference can be chosen by the user if they want to automatically open the previously configured Offline Data File (OST ) along with other files such as NST, BAK & ZDB which is associated with their Outlook account.
- Choose Folder / Files: This preference can be adopted by the user if they want to browse or select the OST file that is available in folder format on your PC or desktop.
Extract Options of OST Conversion Software
The software also has an excellent feature to extract properties from OST files.
- Email Addresses: This factor allows the user to extract Email Addresses from OST files in Text file (.txt) format.
- Associated Email and Phone Numbers: 4n6 OST Converter tool allows users to extract Associated email and phone numbers easily.
- Attachments: This factor allows the user to extract all attachments from OST files to required place.
Enables Compact View for OST File
4n6 OST Converter Software includes an advanced option called "Compact View" that allows you to check only the OST files you want. When you run OST converter tool on your Windows machine, all of the folders will be displayed on the left side. The user can view the desired folder after enabling the option. This feature allows the user to view Offline Storage.ost files in a precise manner. The user can also view a few important options such as Important mails, drafts, Inbox mails, sent mails, Spam, Trash, and so on.
Export Attachments and Save Separately
This OST format converter tool can export all OST file attachments as well as emails. To open and save attachments, the user must right-click on them. If your email contains multiple attachments, select the Save All option. If you have several attachments in a single email, you can save them all in one location. The software enables the Extract >> Attachment option, which allows users to export Attachments separately in their original file format. By enabling or disabling this option, users can view or hide the detailed hierarchical folder structure.
Advanced Search of OST Converter Tool
OST converter has an advanced feature that allows the user to easily search for any type of data within the Offline Storage.ost file. This option is available in the application's right top corner, indicated by a search icon. When the user clicks on the icon, he or she will be able to view various search options such as Emails, Calendars, Contacts, Journals, Tasks, and Notes, as well as the option to search them all at once. This software aids in the search for specific search content based on the date the content was created or viewed. As a result, users can only export Searched messages from OST files.
Export Outlook OST Files Independently
Stand-alone OST converter software is designed to convert unlimited number of OST files without installing Microsoft Outlook on the same machine. This software has been thoroughly tested and produces accurate results. If the user has an inaccessible OST file, this Outlook OST converter tool will recover it. The software is compatible with all versions of the Windows operating system. You can use this advanced Outlook OST Conversion App on any version of Windows such as Windows 11, Windows 10, Windows 8.1, Windows 8, and more.
Convert OST Files with All Components
OST Converter Software for Windows is a complete and reliable solution. Data from OST files is exported to a variety of file formats, including all email attributes and properties such as cc, bcc, date, time, inline image, attachment, and so on. It includes a simple graphical user interface that can be used by all types of users, including technical, non-technical, professional, and others.
Wide Range Compatibility of OST Converter
Outlook OST extension converter works well with Microsoft 365, Outlook 2019, 2016, 2013, 2010, Exchange accounts, IMAP accounts, and Outlook.com accounts. Download the free demo version to test compatibility. It does not impose any size restrictions when converting OST files. You can browse any size OST mailbox in the software environment and complete the conversion successfully.
Software & Hardware
OST Converter Tool - Basic System Requirements
Trial Limitations
Limitations
The free demo version of the software export only 10 files. Buy OST file extension converter full version for complete data conversion.
System Specifications
Hard Disk Space
100 MB of free hard disk space
RAM
1 GB RAM (2 GB is Recommended)
Processor
Processor with a speed of 1 GHz (2.4 GHz is recommended)
Supported Editions
- Microsoft Windows – Windows OS 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) & Windows Server 2025, 2022, 2019, 2016, 2012 R2, 2008
Electronic Delivery
The delivery of 4n6 OST converter tool is automatic. You will receive an email with the link to download the OST File Extension Converter and the activation key within a few minutes after the payment has been confirmed.
User Reviews & Industry Recognition
OST Conversion Tool - Reviews from Experts
CNET
Our team tested 4n6 OST Converter and found it to be the best for Windows users to export offline OST files without facing issues. We are very grateful to the 4n6 team for developing such a powerful, fast and most secure application to convert OST files including attachments, headers and other data.
Software Informer
We want to give 4n6 OST Converter 5-start rating because of its amazing features and workflow. We found this solution to be unique because of its amazing and powerful features. Recommended for Windows users who need to convert OST files accurately.
Working Steps
4n6 OST Converter Software Complete Screenshots





4n6 Software Video
OST Converter Software - Online Video
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4n6 OST Converter Converter Free vs Paid Version Comparison
|
Benefits |
Free Version |
Full Version |
|---|---|---|
| Convert Unlimited OST Files |
Export Only 10 Files |
|
| Export Formats (EML, MBOX, PST, PDF, HTML, TEXT, CSV, vCard, ICS) |
|
|
| Migrate to Gmail, Office 365, IMAP |
Limited |
|
| Batch File Conversion |
|
|
| Preview Modes (Content, Header, Hex, Raw, Properties) |
|
|
| Selective Folder Conversion |
|
|
| Advanced Filters (Date, Sender, Subject) |
|
|
| Preserve Folder Hierarchy & Metadata |
|
|
| Export OST Attachments, Contacts, Calendars, Tasks |
(Export 10 Items Only) |
|
| Technical support |
Community/self-help |
Priority email/chat support |
| License validity |
N/A |
Lifetime |
| Cost |
Free |
Conversion FAQ
OST Converter Tool - Clear Your Doubts Here
Easy Steps for OST Conversion Tool:
- Download OST Converter Software Free and install.
- Browse Offline Outlook Data File (.ost) Files/Folders
- Click the 'Export' button and Select Export File Format
- Enter a local location, enable "Include Email Headers" option.
- Click on the Save option to Start OST Conversion
Yes, this OST converter tool is compatible with Outlook 2019 and other versions.
Yes, you can extract all the associated email attachments and save in their native file format.
Yes, you can convert your calendar folder to multiple file formats. Simply download OST converter and launch on your system.
Yes, this OST converter software is compatible with all the versions of the Windows operating system.
No, 4n6 OST converter is a standalone software that does not require any supportive application.
Yes, 4n6 ensures malware free utility with digital signature. 4n6 OST file type converter is digitally signed and safe to use on any Windows OS versions.
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