How to Open a PST File Without Using Outlook: Complete Guide

A PST or Personal Storage Table is an Outlook data file that can include emails, attachments, contacts, calendar items, tasks, and notes. While Outlook is the default software that opens the PST files, the application can be missing from the system due to licensing, installation, profile or other reasons. In such cases, knowing how to open PST files without Outlook is helpful to gain access to mailbox information without setting up the application.

All in all, this write-up gives practical tips for opening, converting, migrating and archiving PST data. Note: As the first step, you need to make a copy of the original PST file to avoid any damage to the data.

Why Access a PST File Without Outlook?

There can be a scenario, where a user want to check an old PST archive from a colleague, recover it from a backup copy, or just need to open it on a computer where Outlook is absent.

Knowing the steps on how to open a PST file without using Outlook can be useful, when your motive is to read emails, extract attachments in it, analyse the content or want to migrate to different platform. However, here the methods you select may vary depending on the viewing, selective export and mailbox management.

#1: Use a Dedicated PST Viewer

Free PST viewer turns out to be the simplest way to access mailbox information without using Outlook. It scans the PST file and shows the folder structure including the Inbox, Sent Items, Drafts, Deleted Items, Contacts, and Calendar.

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Steps to Open the PST File:

• First, install a reliable PST viewer on your computer.

• Then, run it and select the option of opening or browsing a PST file.

• Choose the needed PST file and let it scan the mailbox.

• Expand folders from the navigation pane.

• Choose the e-mail message you need to view its sender, recipients, date, content, and attachments.

• If there are any available search and filter options, use them.

Free PST Viewer Software can be used for offline viewing of mailbox folders, messages, and attachments without configuring Microsoft Outlook.

Such a method suits perfectly if users need to view some data only. However, there is a catch in here that some free viewers, may add a limit on the export, print, bulk attachment extraction, or advanced search feature.

#2: Convert PST to MBOX and Open It in Thunderbird

The Mozilla Thunderbird is a free email client program that cannot open PST files directly. However, one can work around this problem by converting the PST file into the MBOX format that Thunderbird and other email clients can use.

How to Import the File in Thunderbird?

• One should install Mozilla Thunderbird on the computer.

• Use a good converter to convert the PST file to MBOX format.

• Launch the program and choose Local Folders.

• Install a proper import add-on if it is needed in your version of Thunderbird.

• Choose the MBOX file import option.

• Import the MBOX file.

• Check whether all the emails and their attachments have been imported properly.

It is perfect for people who are studying the way to open PST file without Outlook as it will give them a free environment.

After conversion check all the folder names, timestamps, message formats, and attachments. Tasks, journal, and some calendar items from Outlook will not be transferred to MBOX format.

#3: Convert PST Emails to EML

Each EML file contains only one email and is compatible with Thunderbird, Apple Mail, Windows-based mail readers, and many more applications. EML format is applicable in cases where certain messages need to be opened, transferred, and stored.

How to convert PST to EML?

• Download PST-to-EML converter software.

• Select your source PST file.

• Choose desired folders or emails.

• Pick EML as output format.

• Specify target directory and run conversion.

• Open the generated EML files using EML compatible application.

The sender details, recipient details, email subject, date and time stamps, emails formatting, and attachments can usually be preserved with good converter software.

In case if a user wants to know how to open a PST file without Outlook program, EML format will work perfectly for opening particular emails. However, it is not suitable for very large mailboxes due to the generation of thousands of EML files.

Besides, EML format is designed specifically for emails. Contacts, tasks, notes, and calendar items are presented not so well as in full mailbox formats.

#4: Convert PST Emails to PDF

The process of converting emails to a PDF format is helpful for reading and printing emails and submitting emails as documents. It is usually preferred for audits, legal investigations, customer history, and as a reference material.

• Go through the Process for Saving PST Emails to PDF Format:

• Launch PST conversion software with support for PDF conversion.

• After that, add the PST file that you want to convert.

• Next, pick the necessary email folders from your PST file.

• Also, you can choose particular emails to convert in PDF format.

• Before export, arrange or name the output file as per your requirement.

• Choose the output directory and start conversion.

• View your generated emails using your browser or any PDF viewer.

Check how your attachments are handled before you use the output as a backup. Attachments can be embedded into the PDF files or stored in separate directories.

PDF format is ideal for reading, sharing, and printing emails. It cannot be used for replies, forwarding, contacts management, or for restoring emails to your active mailbox.

#5: Move Converted Emails to Webmail

For users that require a browser-based solution, they can transfer their converted emails to Gmail or any other IMAP compatible email address. It is not possible to directly upload a PST file via the webmail client, therefore, you have to convert and synchronize your emails.

Steps to Transfer the Emails

• Convert the emails from the PST format to MBOX/EML.

• Set up your destination webmail address in Thunderbird or any other compatible email client.

• Import the converted emails in the local folder.

• Choose and copy the emails into the synchronized IMAP folder.

• Make sure to keep your email client running when the emails get uploaded.

• Login via browser and check the uploaded emails.

The process might be hampered by storage limitations, internet speeds, duplicate emails, or email provider limitations.

In the case of considering how to open a PST file without using Outlook, be cautious about uploading any confidential information to any untrustworthy websites that read PST files online.

Essential Safety and Data-Integrity Checks

Scan any unidentified PST files and extracted attachments with updated security software. The archived emails may still carry malicious links, executable files, virus-infected documents, and other questionable scripts.

Always convert a copy of the original PST file. Verify that the selected conversion tool retains necessary attributes such as:

sender and recipients, subject lines, original timestamps, message format, email attachments, folder structure, read and unread status.

Such details may become important during the mailbox migration process, compliance review, investigation, audit, or records retention process.

A PST file that fails to load could be corrupt, encrypted, password-protected, or incomplete. Repeatedly loading an already damaged PST file using various converters may not help. A PST file repair or recovery tool is needed first.

Furthermore, the user should make sure that there is enough space available on the computer for the converted files. Files in EML, PDF, and extracted attachments folder formats may take up much more space compared to the original PST file.

Which Method Is Best?

For read-only viewing of your PST files, use PST viewer software. To transfer emails from PST to Thunderbird and other mailbox software, use MBOX format. For portable emails, use EML format and use PDF format for printouts and documentations.

Webmail migration will be better for you if accessing through web browsers is your priority.

In order to find out the way of opening PST files without Outlook, users need to know what the purpose is behind opening the files. Different solutions are needed if you want to view the files rather than migrate them. The size of the mailbox, operating system, data sensitivity, item types needed, etc. also matter.

Conclusion

Outlook is not required for viewing the content that is saved in the PST file format. Users have the option to use a separate viewer, save the mailbox in MBOX file format for Thunderbird, export certain emails in EML format, save emails in PDF format, or upload the data to a webmail account based on IMAP.

Such ways make it easier for users to access emails and attachments, migrate the data from the mailbox, and store records. The best way is to use a backup copy of the PST file and compare the content before doing anything with it.