SysTools OST Viewer Pro Tool

Open, Read & Save Inaccessible OST Files in PDF Document

(Average Rating 4.9 Based on 1009 Reviews)

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OST Viewer Pro Plus Features

Outlook OST Viewer Pro





Tool to View Orphan OST Files & Export into PDF File

  • Preview Attachments from Outlook OST Files with Name, Subject, & Size
  • Offers Quick & Advanced Scan Modes to Recover Inaccessible OST Files
  • Capability of Reading and Viewing The Password Protected OST Data File
  • Facility to Preview Inbox, Outbox, Contacts, Calendars, Sent Items, so on
  • View OST File Along with Email Properties, i.e., To, Cc, From, Bcc, etc.
  • Advance search for emails, attachments and calendars to search specific data
  • Tool provides support to export OST to PDF using different Naming Conventions
  • Provided different Bates Number formats & Page Layout options.
  • Search option to locate OST File Items & Export into PDF
  • No Need to Install Exchange Environment while Opening the OST File
  • Supports OST File of The Latest Microsoft Outlook 2021 and All The Prior Versions
  • Supports Windows 11 (64-bit), 10, 8, 7 & Windows Server 2019, 2016, 2012 R2, 2008

Free Live Demo - SysTools OST to PDF Converter Tool Fully Secured Download Version

Awards & Ratings of SysTools OST Viewer Software

Highly Rated & Most Popular Outlook OST Viewer Tool

Awards & Reviews

MVP & Expert Reviews

Advance Search to View OST File

With this feature, one can easily search for a specific OST emails, calendars, attachments among a very large .ost file in a simplified manner. Moreover, you can also apply operators and search criteria using Advance Search feature. Besides, these options are categorized as follows:

  • Search Operators: When you try to search for OST files then, you can apply OR, None, AND operators according to your choice. Using this advance feature, you can search within the Outlook OST files without any difficulty.
  • Search Emails using different criteria: In case, you want to search emails then, you have to use the Add Criteria option. It includes multiple criteria including Subject, To, Body, CC, and much more.
  • Search Calendar using different criteria: If the user wants to search a specific calendar item, then the user can use the add criteria option. It includes subject, body, start, end, Importance, Location, etc criteria options.
  • Search Attachments using different criteria: OST Viewer Pro software also provides the option to search for specific attachments files from the OST file. For this, the user can use the add criteria option. And search the attachment from extension wise or name wise.

Advanced PDF Export Settings

Options to Export OST File to PDF Format

Using OST Viewer Pro, you can convert OST file to PDF document. In case, one need to present evidence in courtrooms and forensic investigators also want to export .ost file into PDF format. Along with this, it offers many new features:

  • Naming Convention: One can easily save the exported PDF file by using multiple naming conventions based on the date, year, subject, from, etc. This tool saves each file on the basis Auto-incremental options.
  • Category Based Filter Options: With the help of this feature the user can choose the required emails, contacts, calendar, etc. to export OST into PDF file format.
  • Date based Filter: This tool provides email filtering option so that you can migrate emails based on a certain date range. This feature saves your time and effort while exporting OST file into PDF document.
  • Include Internet Message Header: The user can check this option to include internet message headers.

Search & Export Outlook OST Files Using OST Viewer Pro Tool

Email Search Operators
  • NONE
  • AND
  • OR
Email Search Criteria
  • Subject
  • To
  • Body
  • CC
  • Sent Date
  • Sender Name
  • Received Date
Mail Filtration This option lets users to export selective Outlook OST emails that comes within the selected date range.
Naming Pattern The resultant/converted PDF files can be renamed by applying different naming convention options.

Advanced Features of OST Viewer Pro

List of Key Features in SysTools Outlook OST Viewer Pro

Open OST File with Attachments

Preview OST Files with Attachments

You can easily view emails of an OST file along with the attachments. All the OST files and their properties can be viewed like; From, Subject, To, Sent, received date and size in bytes. This feature also helps the user to have a quick look at email messages.

OST File Advance Search

Advanced Search within OST File

OST Viewer Pro provides the option of an advanced search feature to find a particular email by entering a matching keyword or phrase. You can also apply different filters to carry out an extensive search of messages within an OST file. Also, this application provided support to search Calendars, Attachments using different criteria options.

OST Emails with Details

Show Emails with Various Details

The software is capable enough to view and analyze emails in different modes such as normal, header, attachments, MIME, HTML, properties, and RTF. The data will be available to the corresponding emails that you will select.

Dual-Scanning Modes

Option of Dual-Scanning Modes

On opening OST file, the utility will prompt you to select between two scanning modes i.e. Quick and Advanced scan. Quick scan is selected when file has minimal corruption & advanced scan is chosen when the file has a higher corruption level.

Export OST to PDF

Saves OST Files in PDF File Format

The application gives the option to save emails of OST file into PDF file format. You can batch export the emails and their corresponding attachments in the PDF file format. You can also selectively check or uncheck the emails while exporting them.

Save Files or Folders

Selective Export of Files or Folders

You have the option to check or uncheck the files /folder within the OST file which you want to export to PDF file format. This OST Viewer Pro Tool helps in quick export of data in case of urgency and thus saves time of users.

Data Filter

Date Based Filtering Of Emails

The software provides the option of filtering the emails based on a specific date range and then export them. This saves both time and effort of users while exporting OST data to PDF file format.

Multiple Naming

Naming Patterns to Save PDF File

You can save the converted PDF file by using different naming conventions on the basis of year, date, subject, from, to, etc. The software also saves files on the basis of auto-incremental options.

Data Filter

Support to Stop Loading of Data

The software provides support to stop the loading of data of any selected folder, if required. User can also select multiple folders or items by pressing SHIFT plus mouse left click.

Multiple Naming

Multiple Options to Save Attachments

With OST Viewer Pro tool, user can save emails attachment files with different options. It includes Save all Attachments on pin, Append Attachments in PDF body, and Save all Attachments in their native format.

OST Viewer Pro Software Specifications

Free Download OST File Viewer Pro Software

Software Download

Size: 32.2 MB

Version: 7.0

MD5: 11284c8c7e29cd455901f941b8dd841e

Software Limitations

Free version will preview all Outlook OST Emails, Contacts, Calendar, Notes, Task, Journal Items and will only export 25 items per folder.

System Specifications

Hard Disk Space
100 MB of free hard disk space required

4 GB is recommended

Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz


  • Microsoft .NET framework 4.5 or above should be installed.
  • If you are using Windows 11 (64-bit), Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2019, 2016, 2012 R2, 2008, then please launch the tool as "Run as Administrator".

Supported Editions

  • Microsoft Windows – Windows 11 (64-bit), Windows 10, 8, 7 (32 bit or 64 bit) & Windows Server 2019, 2016, 2012 R2, 2008
  • Microsoft Outlook – 2000, 2003, 2007, 2010, 2013, 2016, 2019, 2021 (32-Bit & 64-Bit)




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Software Customization

If you need to customize OST Viewer Pro tool or need additional features then, Request Quote

Upgrade to OST Viewer Pro Version

Upgrade to Outlook OST Viewer Pro for Advance Search & Export Option

Features FREE Version PRO Version PRO+ Version
Add OST File
Auto Scan Mode
Preview OST Files
View Emails with Attachments
Free Installation on Multiple Computers
Advance Search Options
Naming Option
Save & Export to PDF Document Export 25 Items/Folder
Save & Export to Multiple File Formats
Split Outlook Data File
Cost FREE $69 $129
Frequently Asked Questions

Listed Commonly Asked Questions and Answers

How can I convert OST files to PDF in batch?

SysTools OST Viewer Pro

The Working of SysTools OST Viewer Pro Tool

  • Step 1: Download Outlook OST Pro Tool
  • Step 2: Browse OST File with Advance Scan Option
  • Step 3: Click on Export button and select PDF format
  • Step 4: Browse the destination to save the data

No, there is no such limitation regarding OST file size which the software processes.

Yes, the OST Viewer Pro allows to convert OST file to PDF format either by batch export or by selectively checking or unchecking the folders.

Yes, Of Course, this tool provides an option to save data that is present within OST file and export in PDF format.

Yes, you can view corrupted, damaged, or inaccessible OST files with the help of OST Viewer Pro tool.

No, even this software works fine without having MS Outlook and Exchange environment.

Yes, you can easily view an orphan and inaccessible OST files using OST Viewer Pro application.

Yes, you can preview emails of OST file with attachments using OST Viewer Pro software.

Yes, OST Viewer Pro tool offers Advance Search feature to find a aparticular message within OST file.

No, It will export attachments into corresponding email pdf file. You need to View/Save attachments by click on paperclip clip icon in exported PDF file.
For more information: Read here

No, The attachments will be embedded in the same PDF file in its original format and attachments will open into native format application. For Example: A word(.doc) attachment will be open into Microsoft Word application or other application which support .doc format file.

No, It will create single pdf file for each email with corresponding attachments.

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