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Free OST File Viewer to Preview the Complete OST Data

An OST (Offline Storage Table) file stores a synchronized copy of your Outlook mailbox, allowing access to emails, contacts, calendars, and other data even when offline. While this works reliably with Exchange and Office 365, issues occur when the OST file becomes corrupted, orphaned, or disconnected from its original Outlook profile, making mailbox data difficult or impossible to access through Outlook.

EdbMails Free OST Viewer Tool offers a simple and reliable way to open and review OST files without relying on Outlook or an active mail server connection. It allows you to preview OST files created from Exchange Server, Office 365, or IMAP accounts, including emails, attachments, calendars, contacts, and tasks—even when the file is damaged or disconnected.

Export unlimited OST files to PST

With its intuitive, step-by-step interface, the tool walks you through selecting, scanning, and previewing your OST files. Designed for Windows systems, EdbMails ensures quick and uninterrupted access to your mailbox data, making it a practical solution for anyone needing to view OST contents without Outlook.

EdbMails Free OST Viewer to Easily Open and View OST File Data

EdbMails free OST file viewer lets you open and easily view the contents of OST files. It can also open corrupted and orphaned OST files and is compatible with all Windows and Outlook versions.

The application displays the folder/email data of OST files without an Exchange server profile.
The OST file reader displays the contents of password protected OST files.
Open large size OST files with ease and preview all the email messages, folders, contacts, calendar items, notes, appointments and journals.
You can view the Offline OST files with all of the associated email data.
You can also view the information such as the Sent and Received date of the message, From Address, To Address, Subject, Mail body, Attachments and other email header information.
Quickly open and read an OST file when the Outlook emails are not syncing with the server.

Steps to open OST files with EdbMails OST viewer tool
Step 1: Download and install EdbMails OST to PST converter tool
- Download and install the EdbMails application on any Windows-based computer.
- Open the EdbMails application.
- Enter your email address and password, then click ‘Login’. If you don’t have an account, click ‘Start Your Free Trial’ to continue using the trial version.
  Note: The Free Trial version lets you explore the software features and export up to 30 items from each and every folder. To unlock full functionality, you need to purchase a valid license from the EdbMails website.
  Click here to purchase the license from the EdbMails website.
  After completing the purchase, close and relaunch the EdbMails application, then login using the same email address and password used during the purchase to activate your license.
- Select ‘OST Recovery and Migration’ from the product list.
- Select operation as ‘OST to PST’.
- You can retain the default job name or click the ‘New Job’ button to change the job name.
- Then click 'Next' to continue.
Step 2: Select the OST file you want to open to view its emails
- Click ‘Browse for OST file'.
- Select the offline OST file from your local drive, then click the ‘Next’ button to continue. You can also share the OST file on a network with read and write permissions assigned.
- Click ‘Browse’.
- Choose the folder where you want to save the exported PST files, and make sure the drive has sufficient free space for the export process.
- EdbMails scans the offline OST file and recovers mailbox data, even when the file is damaged or corrupted. During the process, the tool analyzes the file structure and contents to extract emails and other mailbox items. The time required depends on the file size and the level of corruption, so wait until the scan completes to ensure full recovery.
- After the recovery process is completed, the OST file data is displayed in the application interface with its full folder and subfolder hierarchy. You can expand any folder or subfolder to view its contents. When you select a folder—such as Emails, Contacts, Notes, Tasks, or Calendar—the application lists all the items within it and displays a detailed preview of the selected content on the right side of the interface. EdbMails OST to PST Converter allows you to open an OST file without Outlook.

Benefits of EdbMails Outlook OST viewer

Retrieve important information: If the Outlook file or account is inaccessible, the OST file may still hold important data. With EdbMails’ Free OST Reader, you can access the contents and retrieve any critical information without needing Outlook.
Confirm data integrity: If you suspect that the OST file is corrupted or compromised, EdbMails Free OST File Viewer can help you check its contents and verify data integrity.
Repair and view OST files: EdbMails can repair and recover corrupted or orphaned OST files without needing the original Exchange server profile. It also allows you to convert OST files to PST and import them directly into Office 365 or Exchange.

Advanced Capabilities of EdbMails Free OST Viewer Tool

View OST file contents: With EdbMails Outlook OST Viewer, you can view all the contents of the OST file, including emails, contacts, calendar items, tasks, and notes.
Save OST file in different formats: With EdbMails, you can also save your emails from the OST file in HTML, EML and MHT formats for different requirements. Learn how to copy outlook emails to an external hard drive.
Open OST file without Microsoft Outlook: EdbMails Outlook OST Viewer lets you access OST file contents on any computer without needing to install Microsoft Outlook.
Easy to use: The Software comes with a user-friendly interface that makes it easy for you to navigate and preview the OST file contents without requiring technical knowledge.
Lightweight: The tool is lightweight and does not require a lot of resources, making it an excellent choice for users who want to open or view an OST file with limited storage on their computer.
Full software compatibility: EdbMails is compatible with Outlook 2021, 2019, 2016, 2013, 2010, and 2007, as well as Windows 11, 10, 8.1, 8, and 7.

Frequently Asked Questions

How to open OST files without Outlook?
You can use EdbMails OST viewer to open OST files without Outlook. Here are the steps to open OST files with EdbMails.
- Step 1: Install EdbMails Free OST File Viewer
- Step 2: Browse and select the OST file you want to view
- Step 3: Open the OST file and preview the contents such as emails, calendars and contacts. That’s it!
What is an orphan OST file and how do I open one?
An orphan OST file is an Outlook Offline Storage Table (OST) file that has lost its connection to the original mailbox or Exchange Server. This can occur if the mailbox has been deleted or if the Exchange server is permanently decommissioned. When an OST file becomes orphaned, it can no longer synchronize with the mailbox, and any new data or changes made to the mailbox will not be reflected in the OST file.
To open and convert orphan OST files, you can use a specialized tool like EdbMails Free OST File Viewer.
Where is the OST file located on my computer?
The location of the OST file on your computer depends on the version of Outlook and the operating system you are using.
Here are the default locations of the OST file on different versions of Windows and Outlook.
Windows 10/8/7/Vista:
For Outlook 2019/2016/2013/2010:
C:\Users\AppData\Local\Microsoft\Outlook
For Outlook 2007:
C:\Users\Local Settings\Application Data\Microsoft\Outlook
Windows XP:
For Outlook 2019/2016/2013/2010/2007:
C:\Documents and Settings\Local Settings\Application Data\Microsoft\Outlook
Note: represents your Windows user account name.
If you've changed the default OST file location or are using a different version of Outlook or Windows, the file may be stored in a different directory.
To locate the OST file on your computer, follow these steps:
- Step 1: Open Outlook on your computer.
- Step 2: Click on the ‘File’ menu and select ‘Account Settings’.
- Step 3: In the ‘Account Settings’ dialog box, select the ‘Data Files’ tab.
- Step 4: In the list of data files, look for the OST file you want to locate and click ‘Open File Location’.
The Windows File Explorer will open to the location of the OST file.
How to open corrupted and damaged Outlook OST files?
Opening a corrupted or damaged Outlook OST file can be a challenging task as it may not be possible to access the file using Microsoft Outlook. However, you can use EdbMails, which can rebuild and repair the OST file. It is specifically designed to recover corrupted and damaged files and convert the OST file to PST.
- Step 1: Download EdbMails OST to PST converter
- Step 2: Launch the software and click ‘Browse’
- Step 3: Select the OST file you want to convert.
- Step 4: Preview and select the mailbox items for export
- Step 5: Click ‘Export OST to PST’ to start the conversion
- Step 6: Import the PST file into Outlook to view all your mail items
What are the system requirements for EdbMails OST viewer?
EdbMails OST viewer is a lightweight software that can be installed on most Windows-based systems. Here are the system requirements for EdbMails OST viewer:
- Operating System: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP (SP3)
- Processor: 1 GHz processor (2.4 GHz recommended)
- RAM: 512 MB (1 GB recommended)
- Hard Disk Space: 50 MB of free space
- Microsoft .NET Framework: Version 4.0 or higher
- Operating System version: Supports both 32-bit and 64-bit OS