Video

Guide

Eula

OST/PST

File Support

6+

Export Formats

0

Credentials Stored

ZERO

Downtime

GDPR

Compliant Processing

24×7

Technical Support

Preview OST File Data in Detail

Preview your mailbox items & detailed email information stored in OST files without opening them in Outlook

Data Type Details You Can View
Emails OST Viewer Tool lets you preview your emails based on the To, From, Subject, and Date fields of the emails.
Attachments Preview and download single or all attachments associated with a particular email without any further operation.
Contacts You may check the names, e-mail addresses, corporate names, locations, and all additional contact details.
Calendars Check your appointments, meetings, dates, times, and related details.
Tasks & Notes View tasks and notes stored within the Outlook data file (.ost).
Raw HTML Preview the original HTML representation of an email in detail.
Email Header Inspect the complete header details associated with a particular email header.
MIME View the MIME content and structure of the email messages.

When to Use the Aryson OST Viewer Pro Tool

OST File Not Opening

Users can preview mailbox data when an OST file cannot be opened through Outlook or the associated profile is unavailable. For this, user must have the OST file locally saved on their system.

View OST File Without Outlook

View your emails, attachments, contacts, calendars, tasks, and notes from an OST file – all without actually opening it in Outlook itself.

Recover Data from OST File

OST Viewer Pro lets you preview available mailbox items from slightly corrupted or inaccessible OST files and verify the recovered data before saving it. You can convert OST file to Outlook PST for the data backup.

Extract Attachments from OST

Find and save significant attachments from OST emails – all without having to open every single message within Outlook itself. This is applicable only if the OST file is converted to PST format.

Migrate OST to Office 365

Users can actually move their Outlook data files (.ost) to Office 365 and link every file to a particular destination mailbox when an administrator's account has been chosen.

Historical Data Investigation

IT teams can examine older emails, attachments, and other mailbox items when historical communication records need to be reviewed.

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Comprehensive Features of Aryson OST Viewer Tool

Go through the Aryson OST File Viewer & its key features to access and manage OST file data.

View OST Files Without Outlook

No Outlook Dependency

This Aryson OST Viewer allows you to view the contents of the OST data when you have lost your Microsoft Outlook profile, but you want to view the content of the OST file. You must have the OST file saved locally for this purpose.

Support all types of OST Files

Organised Tree-Structure Navigation

The OST File Viewer displays the folder hierarchy (folders and sub-folders) in a tree-like structure. This makes it easy to organise OST files and provides quick navigation to the required mailbox item.

Preview Complete OST Mailbox Data

Automatic Outlook Profile Loading

This software detects and loads OST/PST files associated with configured Outlook profiles, all by itself. Moreover, it displays their file name, file path, and processing status for quick access.

Advanced Search Functionality

Drag-and-Drop Functionality

You may drag your OST/PST file from your system and drop it into the Outlook OST Viewer’s interface to quickly load it. This will save time for most enterprise users.

Multiple Export Formats

File Corruption Detection

When you load files, the application will automatically identify any corruption, marking the file as either 'healthy' or 'corrupted' or 'OST file opened in Outlook'. Even slightly damaged files might be usable, but severely corrupted ones could be skipped altogether.

Keeps Original Data Integrity

Preserves the Original OST Data Structure

Aryson Outlook OST File Reader provides access to mailbox data without changing the original organization of the OST file. The folder hierarchy, emails, and attachments remain arranged according to the source file.

Compatibility With Outlook & Windows/Mac

Migration Logs to Verify Details

The OST Viewer Pro offers a view logs feature that generates a log report, including file details, batch status, loading results, successful or failed operations, timestamps, and processing time.

Comes with a User-Friendly Interface

Secure OST Migration to Office 365

OST files can be moved to Office 365 through secure migration using either Modern Authentication (Browser Login) or Client Secret. Users can choose Single User or Admin authentication with modern authentication.

No File Size Limitation

Bulk Migration with CSV Import

The CSV Import feature of the Aryson OST File Reader allows enterprises to convert/migrate their OST files in one go. Simply import the CSV file containing all the user accounts and migrate data all at once.

Free and Safe to Use

Free Demo Version

This Aryson OST viewer software comes with a free trial version to allow users to evaluate performance. Users can access OST/PST files without Outlook support and convert a maximum of 100 emails per folder and preview 20,000 emails for free.

Advanced Filters of the Aryson OST Viewer Tool

Refine the Mailbox selection based on the Date, Keyword, Sender, Recipient, and Attachment Filters

Date-Based Filter

Convert emails within the range of Start Date and End Date, or select Include Selected Date, Exclude Selected Date, or All Dates.

Email Field Filter

OST Viewer Pro filters emails using To, From, Subject, CC, and BCC fields, with conditions such as All, Contains, or Does Not Contain.

Keyword Filter

Search and select emails using specific text or keywords from the available email fields and preview them.

Attachment Filter

Choose whether to keep attachments, extract attachments separately, or exclude attachments from the exported data.

Duplicate Email Filter

Outlook OST Viewer identifies duplicate emails by matching selected fields such as To, From, Subject, CC, BCC, and Body.

Duplicate Folder Handling

Save duplicate emails in a separate folder and optionally preserve the original folder hierarchy inside it.

Folder Selection

Select required folders from the mailbox folder tree and maintain the original hierarchy during export.

Skip/Resume Filter

Enable Skip to avoid processing previously handled items and resume the operation when required.

PST Split Option

Enable splitting and divide the resultant PST according to a selected file-size limit (up to 999 MB or 45 GB).

Migration Scope Filter

For Office 365 migration, selectively choose emails, contacts, and calendar events, along with the Remove Duplicates option.

Text-Based Filter

Filter your emails using specific text in fields such as To, From, Subject, CC, and BCC. Use conditions like 'All', 'Contains', or Does Not Contain to narrow down the results.

Custom Folder Name

Set a custom name for the destination folder to organise the exported OST/PST data according to your requirements.

Map Multiple OST Files to Office 365 Mailboxes

The Aryson OST Viewer tool allows organisations to efficiently perform flexible mailbox mapping when they migrate OST data to Office 365. For admin authentication, users can map multiple OST files to destination mailboxes with 1:1, 1:M, M:1 & M:M mapping support. Whereas, for single-user authentication, the software can perform 1:1 and many:1 mapping. With the help of this utility, it is now possible to map each OST file to a different intended mailbox to improve the precision of migration. The “Mapped with Default Mailboxes Feature” maps the default folders of the OST files to the default folders of Office 365.

System Requirements: Aryson OST Viewer Tool

Software Download

(Windows)

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Size: 208 MBVersion:26.9

Trial Limitations

The free OST viewer software (demo version) allows users to view 20,000 emails and read all the mailbox data in OST files. In addition, to save your OST files, you can export up to 100 items per folder. You can remove all these limitations by upgrading to the full licensed version of the Aryson Outlook OST Viewer.

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Software Guide

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Installation

Uninstallation

Requirements & Supported Versions

Hard Disk Space: Minimum 1GB free space required

RAM:Minimum 4 GB (4 GB or above recommended)

Processor:Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz or higher

Supported Platforms

Window OS: Windows 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, and 95.

Outlook Versions: Office 365, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97.

Software Prerequisites

  • If you are using Windows OS 7, 8, 8.1, 10, or 11 (either 32-bit or 64-bit), then you must launch the Aryson OST Viewer Tool as an administrator.
  • Turn off the Windows Firewall for proper installation.
  • Disable the antivirus programmes.
  • Establish a proper internet connection.

FAQ

Request For Software Customization

Note: If you need to customise Aryson Software or need additional specific features, then provide this software customisation. Request Quote

Aryson OST Viewer: Demo vs Licensed Version

Product Features Demo Version Full Version
View OST File 20,000 emails previews In Single Licence: 20,000 emails previews Other Licences: Unlimited previews
Save OST files into PDF, PST, MBOX, EML, MSG, CSV and Office 365 100 emails per folder Unlimited Files
Migrate OST to Office 365 100 emails per folder Complete Mailbox
View both OST and PST files Supported
  • Single Licence: Only OST
  • Other Licenses: Both PST and OST
View body, attachments, HTML, MIME, headers, notes
Access Bulk OST files
Preserve the Folder Hierarchy with Alphabetical Sorting
Option to Search Emails
Support all Outlook versions
Advanced Date Filter
Remove Duplicate Emails
Compatible with All Windows & Mac Versions
24/7 Technical Support
Money Back Policy

Frequently Asked Questions

Ans.Yes, the Aryson OST Viewer Pro maintains the original folder hierarchy, so users can easily find and access important emails. But the folders are arranged alphabetically.

You can export OST files to formats such as PDF, EML, MBOX, MSG, PST, and CSV using this software. You just have to:

  1. Add the Outlook files (.ost) to the Aryson Outlook OST Viewer.
  2. Preview its details >> select the output format/migrate to Office 365.
  3. Map the files to the target mailboxes, if needed.
  4. Apply the migration filters and click Save.

Ans. The Aryson OST Viewer Tool allows you to access emails, attachments, contacts, calendars, tasks, notes, and other mailbox folders stored in OST files.

Ans.Yes, the OST Viewer Tool allows you to split the resultant PST file into manageable parts. You may split these files up to 999 MB or 45 GB, with a custom name for each output file. Files greater than 45 GB are auto-split.

Ans.The software allows you to map each source OST file to the required target Office 365 mailbox before migration. You can select the destination mailbox for each OST, or you can use CSV Import to make mapping easier for multiple files. Then you can save the mapping and start the migration.

Ans.Aryson OST File Viewer provides options to keep attachments with emails, save them separately, or exclude them. When saving data to PDF, you can also use Attachments as Pages to include each attachment as a separate page.

Ans.Yes, the OST Viewer Tool lets you export Outlook OST Data into single PDF or combine emails from folders into Merged PDF. The Merged PDF option also automatically splits files exceeding 500 MB.

Ans.Aryson’s Smart Search helps users quickly locate specific emails in the preview window using criteria such as sender, recipient, subject, attachments, and date range.

Ans.There are multiple filtering options available in the tool, which are used to optimise the OST files before saving or migrating them.

  • Date range filter
  • Skip Previously Migrated Items
  • Duplicate Removal
  • Duplicate Email Filter
  • Attachments Handling
  • Custom Folder Naming
  • Split PST File
  • Text Filter
  • Mapped with default mailboxes
  • Follow tree hierarchy

Ans.Yes, Aryson offers a free demo version for opening and previewing 20,000 OST files. The demo version allows saving only 100 items per folder; the full version allows saving the entire mailbox data.

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