BitRecover Free OST Viewer

Software to Read Outlook OST files in Windows and Mac OS

  • View OST file with emails, contacts, tasks, calendars, notes, journals etc.
  • Open OST file of Microsoft 365, Exchange Server, Outlook 2019, 2016 etc.
  • Efficiently Extract searchable emails from OST file with attachments.
  • OST Viewer to Read email from OST folder like Junk Email, Inbox, Outbox.
  • Preview OST file with count of email messages, Subject, From, To, CC.
  • OST Email Viewer facilitates users to read OST file without Outlook.
  • Freeware OST file reader is a tested tool that helps to view large OST files.
  • Open existing OST file having all sorts of encryptions such as No Encryption, Compressible Encryption and High Encryption.

Best OST Reader for Windows & macOS

Free OST Viewer is an easy to use forensic-class read-only OST file reader tool. By utilizing this open source OST file viewer, user can easily open orphaned OST file with attachments. Users can simply open and view OST file contents without any MS Outlook installation using this tiny portable utility. It is capable to open existing OST file including emails, contacts, calendars, tasks, notes, journals, etc.

OST Viewer Freeware Features & Benefits

View OST File Contents (Email, Contact, & Calendar)

Open Unlimited OST Files One-by-One

OST Open File Tool is designed in such as a way that it authorized to view unlimited OST files one-by-one. In order to read OST file, first start this portable OST File Viewer software and then click on the “Add File” button to browse an OST (Offline Storage Table) file from your PC.

Open Existing OST File with All Items

BitRecover OST Viewer Open Source freeware software plays an important role during open existing OST file. It is capable to preview OST file inclusive of complete detailed information & components like To, Cc, Bcc, From, Subject, Signature, Text, Headings, etc.

MS Outlook Installation Is Not Compulsory

OST Reader Mac & Windows OS Software is specially introduced to view OST files without Outlook program. In simple words, Microsoft Exchange Server or Outlook installation is not mandatory for previewing OST files. It is a standalone toolkit to open orphaned OST file.

OST File Viewer to Read Contacts with Details

The tool is also known as OST Contacts Viewer because it gives facility to read OST file contacts. Users can freely view OST file contacts with Name, Surname, Phone Number, Business Address, Home Address, Web Address, Email ID, Contact Photo, and other all details.

Read OST Emails Serial Number & Attachments

After uploading an Outlook OST file in the software panel, the tool previews attachments, serial numbers and subject. Users can easily count emails per folder using serial number. If an email has embedded attachment then users can easily found that specific email with (*) icon.

Compatible with ANSI & Unicode OST Files

This Open OST Tool is an authoritative software for Windows & Mac OS users that supports both old ANSI and latest Unicode characters OST files. OST Viewer is fully consistent with OST files of Microsoft Exchange Server or Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, etc.

Maintains Folders Hierarchy During Preview

This open source OST file viewer freeware software offers “Add File” option for adding OST file data in the software panel. Thereafter, users can view all OST folders in the software window in original formatting and at last choose any specific folder for previewing OST emails.

Open Encrypted OST File Securely

OST Viewer for Mac & Win OS Tool supports all .ost file formats having No Encryption, Compressible Encryption and High Encryption. Using this advance feature, forensic investigators can easily analyze OST files in the software interface to get piece of evidences.

System Requirements & About Software

Know the minimum system specifications to install the product on your Windows & Mac OS Computer.

Software Name: OST Viewer
Free Download:

Download for Windows OS Download for Mac OS

Version: 2.0
Processor: Minimum 2.4 GHz Processor
RAM: Minimum 1 GB
Minimum Hard Drive Space: 100 MB
Operating System: Windows OS: Windows 10, 8.1, 8, 7, Vista, XP, Windows Server 2019, 2016, 2012, 2008, 2003, etc.
Mac OS:10.15 Catalina, 10.14 Mojave, 10.13 High Sierra, 10.12 Sierra, OS X 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks, 10.8 Mountain Lion, etc.
Outlook Editions: Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97.
Exchange Editions: Exchange Server 2019, 2016, 2013, 2010, 2007, 2003, 2000, 5.5, and 5.0.
Installation & Un-installation for Windows: Install Uninstall EULA

How to View OST Files without MS Outlook?

Watch live video tutorial to read an OST file

Commonly Asked Questions

You can go with these simple steps to read email from OST file.

  • Step 1: Download Microsoft OST Viewer Tool for Mac & Windows OS.
  • Step 2: Choose Add File button for uploading an OST file.
  • Step 3: Preview all OST folders in original hierarchy in the software window.
  • Step 4: Click on any email folder for loading all messages.
  • Step 5: Choose specific email to read OST file with attachments.

Yes, this free OST viewer is completely compatible with any version of Windows whether it is Windows 10, Windows 8.1, Windows 8, and etc.

Yes, no need to worry. This tool will surely help you as it is intelligently designed by keeping your essential requirements in mind. So download and enjoy free OST viewer tool.

why not! Go ahead and download OST reader for mac tool. This is completely free OST viewer for Mac OS X software.

Yes, this is a portable OST viewer for Mac and Windows. You can use this utility on your Mac laptop to view OST email messages in easy steps.

Yes, this OST file reader is completely free of charge. There are no hidden terms and conditions related with OST viewer tool.

No, OST Viewer freeware tool can be used to read OST files with all information. If you want to convert OST files then use this software to successfully migrates unlimited OST files.

OST file is offline folder file in MS Outlook represented with .ost extension. Now users can easily work offline and server automatically synchronize changes with Exchange Server the next time they connect. Ability to work offline is useful in environments where network is limited or unreliable. Thus, the creation of ost file allows users to work in situation of server downtime as well.

While working in an offline mode, Microsoft Outlook generate an exact copy of user mailbox on Exchange Server named as offline folders with OST file extension. A file i.e. aforementioned file is saved locally on desktop named as Offline folder file. Exchange contains the exact replica of the folders of an individual users. Any type of modification you perform offline will automatically synchronized when connected to Exchange Server.

By making use of send/receive command, you can perform send or receive functions and copy the changes which were made while working offline. During this process, permanently deleted items get removed from the Exchange’s Server copy also.

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