Online OST Viewer

Open Email Online for Free

OST
Outlook Offline Data File
An OST file is a data file created by Microsoft Outlook (2005 or later), an email client and personal information manager. It is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. OST files may contain email messages, contacts, tasks, calendar data, and other account information.
OST
Outlook Offline Data File
An OST file is a data file created by Microsoft Outlook (2005 or later), an email client and personal information manager. It is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. OST files may contain email messages, contacts, tasks, calendar data, and other account information.

Get started with online OST viewer

Free OST online viewer and much more!

Without registration

Registered users

1
Select document format from a drop down.
2
Click on Open Viewer App button.
3
Click inside the file drop area or drag n drop file into it to upload file.
4
Click on View button to open document or click on to get share link.
1
Sign in or Log in into conholdate.app
2
Go to your Dashboard
3
Upload your documents
4
Click on button next to a document.
5
From opened drop down menu select View option or click on the document name.
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