Top 5 Best OST to EML Converter in 2023

OST is a Microsoft Outlook data file that stores the collection of mail items, such as emails, contacts, calendars, attachments, tasks, notes, etc. But, if you have OST file and you are planning to migrate from Outlook to EML based email client, you can’t directly transfer OST to EML format. For this, you must convert the OST file containing the mail items into EML format using the best OST to EML Converter. Once converted, you can import EML into any Email client application.

Since Outlook doesn’t provide an option to convert OST to EML format, you can also drag and drop each email one by one and convert OST emails from Outlook to EML file format. But for this, you must have the Outlook application installed on your computer. Also, this method doesn’t guarantee a safe and successful conversion. So, give a try the following Best OST to EML Converter software.

List of Top 5 Best OST to EML Converter for Windows

Below we have listed the top 5 best OST to EML converter software that you can use to convert orphaned, corrupted, or inaccessible OST files into EML format.

1. Advik OST to EML Converter

Advik OST to EML Converter is one of the most advanced and powerful tools to convert OST files into EML format while maintaining the original folder structure and email attributes. It also saves OST emails in multiple formats such as PST, EML, MBOX, PDF, MSG, XPS, RTF, HTML, MHT, etc.


  • Convert one or more OST files into EML simultaneously.
  • Simple and Easy User interface for both technical and non-technical users.
  • Before saving, shows an improved preview of OST mail items.
  • Offers sophisticated filters to save OST email contents according to different standards.
  • Supports Windows Server 2008, Windows 10, Windows 8.1, Windows 7, and other previous versions.

2. Xtraxtor OST to EML Converter

Another cutting-edge OST to EML converter program created to extract and export MBOX files to PST format is Xtraxtor OST to EML Converter. It can accurately and completely convert all OST files, including corrupted, inaccessible, or damaged files to EML files. Anyone with little to no technical knowledge can easily convert one or more OST files into equivalent EML files with its comprehensive and user-friendly user interface.


  • Allow for simultaneous multiple OST to EML conversions.
  • Saves OST email items in HTML, PDF, EML, MSG, and other file formats.
  • During conversion, it maintains folder hierarchy and email attributes.
  • compatible with Windows 11 (and older versions), 10, 8.1, 8, and 7.
  • Installation of Microsoft Outlook is not needed to convert OST to EML files.

3. SysTools OST Converter

SysTools OSTconverter is an advanced utility that allows users to export damaged, corrupted or password-protected OST files into EML file format in a single go. Moreover, it also provides so many advanced export options to convert OST files; such as it retains the original folder structure of OST files throughout the conversion process.


  • OST email items can be saved as PST, EML, MSG, PDF, TXT, RTF, HTML, and MHTML files.
  • Advanced Email Filters to find mail items according to various basis.
  • Easy-to-use GUI to use this utility without any difficulties.
  • Allows previewing OST email items before OST to EML conversion process.
  • MS Outlook 2021, 2019, 2016, 2013, 2010, 2007, and 2003 are supported.

4. Yota OST Converter Tool

Yota OST Converter Tool is a very powerful OST mailbox converter utility that enables you to convert OST files into PST, EML, or MSG format while maintaining data integrity. It supports bulk conversion of OST files to EML file format. Additionally, it has the ability to export emails from OST files directly to Office 365 or a live Exchange Server mailbox.


  • Convert OST file to a variety of widely used formats such as EML, MBOX, PDF, PST, etc.
  • Maintain all email items, components, characteristics, etc.
  • Import OST file into various cloud email services like Gmail, Office 365, Yahoo, etc.
  • Also, allows you to choose the desired destination path to save the resultant file.
  • No File size limitations to upload OST Files into software GUI.

5. Zook OST to EML Converter

An effective solution for converting MBOX files into Outlook PST files is Zook OST to PST Converter. It easily extracts all email items from the OST files, including emails, contacts, calendars, tasks, and notes, and saves them as EML file format. Furthermore, it preserves folder structure and hierarchy while converting OST files into EML or any other format.


Allows for the conversion of OST emails with embedded attachments to EML.
Highly capable of preserving the original structure of the folder hierarchy.
Supports Bulk OST to EML Conversion via dual options to upload OST files.
Supports Outlook OST Files of 2019, 2016, 2013, 2010, 2007, etc.
The tool’s intuitive interface offers a direct option for OST to EML conversion.

Final Words

You must convert OST file into EML format if you intend to move your email items from Outlook to EML supported email client application. You must use an advanced OST to EML converter program because Outlook email client lack a built-in feature to export email items to EML format. To determine which one best suits your requirements and price range, examine the top 5 best OST to EML converter tools listed in this post based on their advantages and disadvantages.

Read Also: Best OST TO PDF ConverterĀ 

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