How to open .ost file format?

The probably reason why you are at this website is a problem with opening .ost file. The full name of the file is Outlook Offline Folder File. If the double-click on the file’s icon shows you a message that additional programs are needed to open the file, you’ll find the list of helpful programs in the bottom of the page.The developer of this format is Microsoft.

Programs using this file extension: .ost

The file extension .ost can be used by another programs. If you have some useful information about .ost file type that may help other users HowOpen.org, please send them to us and we’ll update our database.

Visiting our website you are probably asking yourself:

• What application can open .ost file?
• How to open .ost file?
• What is .ost file?
• How can I convert .ost file?
• Where can I find informations about .ost file extension? (for example on the File Extension website)

We hope we have given you enough informations about this file type. Otherwise you can search some informations about .ost extension on Wikipedia.org.