OST4: OST to PST Converter

OST to PST Converter is 100% windows supported software which is securely extract the corrupted OST file data and quickly start the software converting process OST file to PST file and gives the extra export option: Office 365, Live Exchange Server and other many formats with all folders items, Meta Properties and attachments etc.

Able to Repair and Convert inaccessible OST file into PST Outlook file.

Allow exporting with complete Original Meta Information without any trouble.

A Quick way to converting any size of large OST file into PST file format.

Save repaired OST email data with multi-formats PST, EML, MSG, and HTML.

Easy to Conversion OST to Office 365 and Live Exchange Server.

Free Download OST4 demo version recovery Tool without pay any cost.

OST4 software that help you to repair PST file & see emails data.

Easily Install OST4 Tool on your Computer with support all Windows.

Smooth process for save OST to PST file by using OST 4 Software.

Free Download Purchase Now How Its Work


Extra Software Features

Repair Inaccessible OST file

Using this Convert OST to PST Software can easily reduce Outlook OST file errors with repair inaccessible OST file emails. It very safe repairing tool to solve all related bugs from OST file.

Preview Recovered Emails

The software allows users to fix whole corruption problems from OST file with capable to after repairing easy to preview recovered emails and simple user interface OST4 Software.

Convert whole folder item

For creation OST users satisfied regarding this OST to PST Converter process, the utility gives easy technique to complete folder items emails, journals, attachment, inbox, calendar, and contacts etc.

Export OST file into Office 365

OST4 Software is one of the best Offline conversion tools that can allow exporting offline OST file data into Office 365 file account with solving all corruption problems.

Transfer to Live Exchange Server

With the help of this OST to PST Converter Software users without wast timing transfer emails to Live Exchange Server with original folders structures in few minutes.

Save OST file to PST Outlook

This OST4 software gives the facility that now every user's export & save repaired damage OST file into PST file with open Microsoft Outlook formats and complete data.

Migrate data with Meta Data

OST to PST Conversion utility gives the facility which has users can recover permanently deleted emails data and lets you can very smoothly export & migrate data with Meta Data information.

Export email into Many formats

During this conversion process to save OST file as PST file and Apart from export OST email data into many other required formats like as EML, MSG, and HTML without harm any internal structures.

Free Demo version Software

OST4 Tool is available free demo version tool to repair any size of damage OST file, as well as the tool, gives users permission to migrate & convert 30 emails in every folder items in Outlook PST file.

Free Download OST to PST Recovery, Converter, Migration Software

Easy to convert free 30 emails in each items into your required formats.

OST4: OST to PST Converter Screenshots


Select the Corrupt OST file


Display Emails items


Select Export Option


Complete Saving Process

Software Requirement

Processor: Pentium Class

Memory: 512 MB Minimum

Hard Disk: 50 MB of free space

Operating System: Windows 10, 8.1, 8, 7, Vista, XP

Supported Microsoft Outlook: MS Outlook 2019, 2016, 2013, 2010 and all versions.

Asked Questions

Of course, you can select those file which you want to convert from OST folder and convert them into Outlook PST and other file formats like PST, EML, EMLX, MSG, HTML, vCal, vCard, MBOX.

Yes, before finishing conversion it displays the preview of recovered mailbox along with all the data of OST mailbox.

Of course, you also export single as well as multiple OST files at a one time without facing any difficulty.

Yes, it is compatible to work with all the version of MS Outlook 97, 98, 2000, 2003, 2007, 2010, 2013 and 2019 (32 bit & 64 bit) also included.

Yes, you can also convert OST data into PST in the absence of MS Outlook but to open data into PST file format Outlook is mandatory.

Yes, it is designed by using the best algorithm that makes it easy to use for a novice user and a non-technical user.

No it does not support Mac, It only supports windows.


I was stuck when my Outlook mailbox got corrupted and I was really hopeless, I neither had any technical skills to perform manual method nor I had information about the third party application, someone suggested me an OST Recovery tool of OST4 software and I got access to all my Outlook mailbox within a few minutes.

David Pressler(Florida: USA)


OST4 is an intuitive and easy to use software which actually helps to retrieve OST files and convert them into accessible PST without any complications.

Joseph Pepe(Pennsylvania: USA)


I have been using OST to PST Converter for a long time, it wonderfully works for me, and I am really a fan of the quickly response of its technical assistance team,