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How to open .ost file extension?

File Type : Document file type
Compatible with (WinXP,Vista,Win7,Win8 and Win10)

Looking for a program to open .ost files?

"Windows unable to open a file!" is probably the most common error faced by millions every day. This is either because the program required to open a file is not available on your system or there may be other issues.

We recommend that you run a free scan to check for missing drivers.



What is .ost file extension?

.ost file extension is a known file type. This section of tells you everything you need to know about this extension.
The OST file extension is used for the e-mail messages and other data saved by Microsoft Outlook (2005 or later) from an Exchange server. It is similar to a Personal Folder (.PST) File, but supports bigger file sizes. OST files are created when the "Use Offline Folders" option is selected in Outlook and the same is stored on the local hard drive instead of mail server.
You can see a list of software programs here on that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.

Software that can be used to open .ost files:

Microsoft Windows:
  • Microsoft OST Integrity Check Tool
  • Outlook Recovery Toolbox
  • Microsoft Outlook 2013
  • Remo Convert OST to PST