How do you open & view an OST File without Outlook?

You can easily view and read the OST file with this OST Opener Software. To read the OST file, go through the given steps: Open the Aryson OST Viewer on your system. Choose the OST file and add it to the software. Next, preview the selected OST data in tree format.

Do I need to have Microsoft Outlook installed to use this OST viewer freeware?

No, you do not need Outlook to use this software. You can view OST file data even on systems without Outlook.

Does this utility maintain the original folder structure of the OST file?

Yes, this utility preserves the original folder hierarchy. So that you can browse emails, contacts, calendars, and other mailbox items exactly as they were organized.

Is there any size limitation for opening OST files?

No, the Aryson OST Viewer Tool supports OST files of any size. No matter whether your file is small or large.

Can I view email attachments with Aryson OST Viewer?

Of course, yes, anyone can preview their attachments along with images, documents, and other embedded files.

What types of OST files are supported by this utility?

The Aryson OST Viewer Tool supports OST files of all versions of Microsoft Outlook, like Outlook 2021, 2019, 2016, 2013, and earlier.

Does this OST File viewer allow me to export OST file data to other formats?

If you want to save or convert OST files into different formats, you can continue with the export options of the software.

Is the Aryson OST Viewer Tool free to use?

Yes, you can view the OST file for free. Although if you want to save the OST file, it will help you export 50 items per folder for free.

OST Viewer Software to Read or View OST Files Freely

Aryson OST Viewer Tool

View, Read & Access OST Files Effortlessly with OST Viewer

The Aryson OST Viewer Tool is an easy-to-use software to help you view and read OST files without installing Microsoft Outlook. This free utility ensures that you can open and analyze orphaned OST files, including their complete mailbox data such as emails, attachments, contacts, calendars, journals, and more.

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Open and view OST files without Microsoft Outlook or Exchange Server.

Display Outlook items like emails, calendars, contacts, tasks, and more.

Outlook OST viewer keeps the original structure of mailbox folders intact.

Supports unlimited OST files, with no restrictions on file size or count.

View normal password-protected and encrypted OST files with ease.

Save OST data as PST, PDF, MBOX, EML, EMLX, MSG, CSV, and HTML formats.

Fully compatible with Windows 11, 10, 8, and all earlier versions.

Users can quickly locate specific emails or items within the OST file.

Along with that, it can retrieve and view emails from a specific date range.

You can save the resultant OST file data according to your preference.

Export only those emails that match specific keywords found in the message.

Free OST Viewer can view and export OST file data without any cost.

Download Live Demo: Download Free OST Viewer Tool Fully Secured Download Version.

Data Type	Details You Can View
Emails	Subject, sender, recipient, body content, attachments, formatting, and embedded images.
Attachments	Documents, images, PDFs, ZIP files, and other file types linked to emails.
Contacts	Names, phone numbers, email addresses, company details, and notes.
Calendars	Meetings, appointments, events, and reminders with date, time, and location details.
Tasks	Task descriptions, priority, status, start/end dates, and progress.
Notes	Written notes, memos, and quick reminders are stored in Outlook.
Journals	Activity logs, meeting histories, and communications tracking.
Folder Structure	Original mailbox hierarchy including inbox, sent items, drafts, deleted items, and custom folders.

Data Type

Details You Can View

Emails

Subject, sender, recipient, body content, attachments, formatting, and embedded images.

Attachments

Documents, images, PDFs, ZIP files, and other file types linked to emails.

Contacts

Names, phone numbers, email addresses, company details, and notes.

Calendars

Meetings, appointments, events, and reminders with date, time, and location details.

Tasks

Task descriptions, priority, status, start/end dates, and progress.

Notes

Written notes, memos, and quick reminders are stored in Outlook.

Journals

Activity logs, meeting histories, and communications tracking.

Folder Structure

Original mailbox hierarchy including inbox, sent items, drafts, deleted items, and custom folders.

Open OST Files Without Outlook

For Outlook users, opening OST files is simple, but it's a different story for non-Outlook users. That's where Aryson Free OST Viewer comes in as the ideal solution. It allows access and open OST files without MS Outlook or an Exchange Server environment.

Read Multiple OST Files at Once

Outlook only permits users to open one OST file at a time, which can be time-consuming and inefficient. Aryson’s OST Opener is a fast utility that allows you to open multiple OST files simultaneously. With this tool, you can access your files without the hassle of conversion.

View Inaccessible OST Files

Large OST files often become inaccessible, making them difficult to open in Outlook. In such cases, you should repair OST files first. Then, use the Aryson OST file viewer to view the OST data associated with that specific Outlook data file.

Access All OST File Contents

Sometimes, users need their OST data into simple and easy-to-read format, like PDF. Because PDF is supported on all devices and operating systems. that case, you can use OST to PDF Converter to avoid the hassle and get the OST data as PDF for long-term availability.