SysTools OST Recovery

by SysTools Software

A Windows Utility for recovering corrupted OST Archive files

Operating system: Windows

Publisher: SysTools Software

Release: SysTools OST Recovery 7.0

Antivirus check: passed

Last revision: Last week

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This lauded and popular Windows utility can be used to repair OST and NST archive files created from multiple versions of Outlook, including versions 2019, 2016, 2013, 2010, 2007. This utility can work with encrypted OST files as well as supported archive files of unlimited size.

The recovery process supports 2 modes: advanced and quick scan. The quick scan can be used for moderately corrupted OST files while the Advanced scan is better suited for catastrophic corruption scenarios. The tool also provides the ability to inspect the file in multiple preview modes (more than 7 views). For example, HEX mode can be used to inspect data byte by byte, while the Message Header view can be used to inspect the envelope of recovered messages, among other detailed header properties. After a successful recovery, the OST file contents can be exported to multiple formats, including OST, .eml, and .msg. Once an OST file has been successfully scanned, it can be saved and reopened. Finally, after the OST file has been restored, SysTools will render a summary report, including details on the recovery process. This report can, of course, be saved to a CSV formatted file.


Recover lost or deleted emails
  • After recovering an OST file, search and save only the emails you need
  • As mentioned above, the SysTools utility can work around existing encryption when recovering emails (including S/MIME and OpenPGP encryption)
  • The utility can be used to search for OST files in both default and non-default file system locations.
  • Supports recovery from both single and multi-file OST archives
  • Displays summary statistics of items contained in the recovered OST file (including Email, Calendar, Contacts, Notes, etc.)
  • The OST tool can be used without requiring Outlook to be installed

Recommended hardware requirements:

  • minimum of 500 MB RAM (2 GB recommended)
  • 1 GHz processor (2.4 GHz recommended)
I love using SysTools OST Recovery for Windows because it makes it a cinch to restore OST files and then convert them to PST files, so that my files can be opened and edited directly in Microsoft Outlook. But it's not just compatible with PST conversion; you can also use this tool to convert your files to other formats, including EML and MSG 1.
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