Convert OST to PDF with Attachments: Complete Guide (2026)

Do you want to convert OST to PDF for sharing Outlook emails, archiving important conversations, or keeping legal records? You're not alone. Many Outlook users need to save their emails in PDF format because it is universally accepted, secure, and easy to access across different devices.

However, Outlook doesn't provide a direct option to convert OST files to PDF with attachments in bulk. While there are manual techniques available, they can be time-consuming and may not preserve attachments or folder hierarchy. In this guide, we'll explain both the manual and automated approaches so you can choose the one that best fits your needs.

Why Convert OST to PDF?

There are several practical reasons why users prefer PDF over OST files.

1. Easy Sharing
PDF files can be sent through email, cloud storage, USB drives, or messaging platforms without requiring Microsoft Outlook.
2. Universal Compatibility
PDF documents can be opened on Windows, macOS, Linux, Android, and iOS using almost any PDF reader.
3. Better Security
PDF files support password protection, encryption, and digital signatures, making them suitable for confidential communication.
4. Long-Term Archiving
Organizations often archive important emails in PDF format for legal, compliance, or documentation purposes.
5. Print-Friendly Format
PDF preserves the formatting of emails, making it ideal for printing official records.

Manual Method to Convert OST to PDF

If you only need to save a few emails, Outlook's built-in features can help.

Follow these steps carefully.

1. Launch Outlook and open the mailbox containing the desired email.
2. Double-click the email you want to convert.
3. Click:File → Save As
4. Choose HTML as the file format and save it.
5. Open the saved HTML file using Microsoft Word.
6. Go to:File → Save As
7. Select PDF (*.pdf) as the output format.
8. Click Save.
9. Your Outlook email has now been converted into a PDF document.

Alternative Manual Method (Print to PDF)

Modern versions of Outlook provide another option.

• Open Outlook.
• Open the email.
• Click File → Print.
• Select Microsoft Print to PDF.
• Click Print.
• Choose the destination folder.
• Save the PDF. This method is easier than converting through HTML.

Limitations of the Manual Method

Although the manual method is free, it comes with several drawbacks.

• Converts one email at a time
• Cannot batch convert OST files
• Attachments are not included inside the PDF
• Folder hierarchy is not preserved
• Time-consuming for large mailboxes
• Risk of missing emails during manual selection
• Not suitable for enterprise users

If your OST file contains thousands of emails, manual conversion quickly becomes impractical.

Professional Method to Convert OST to PDF

When you need to convert OST to PDF with attachments or export an entire mailbox, using a dedicated DRS Softech OST to PDF Converter is a more efficient solution. It also allows you to import OST files to Office 365, IMAP, Google Workspace, Gmail, and more.

• A professional converter typically allows users to:
• Convert single or multiple OST files
• Export complete mailboxes to PDF
• Preserve email formatting
• Maintain folder hierarchy
• Keep metadata intact
• Apply date range filters
• Exclude duplicate emails
• Convert large OST files without data loss
• Convert OST files to EML, MSG, PDF, and more

How to Convert OST to PDF Using an Automated Tool

The process is generally straightforward.

1. Download and install the DRS Softech OST File Converter.
2. Choose “Select Files” or “Select Folder” to add your OST files.
3. Preview and select the OST files to convert. Click Next.
4. Then, choose PDF as the Saving Format from the given list.
5. Lastly, apply advanced features as needed. Press Start Export.

The software exports all selected Outlook emails into PDF format while preserving the original data.

Tips Before You Convert OST to PDF

To ensure a smooth conversion process:

• Create a backup of the original OST file.
• Close Microsoft Outlook before using third-party software.
• Verify the destination folder has enough storage space.
• If converting multiple mailboxes, organize them beforehand.
• Use filters to export only the required emails.

Conclusion

Converting Outlook OST files to PDF is useful for email archiving, document sharing, legal compliance, and long-term storage. If you only need to save a handful of emails, Outlook's built-in Print to PDF option works well. However, when dealing with large mailboxes, multiple folders, or attachments, the manual process becomes slow and restrictive.
An automated OST to PDF Converter simplifies the entire process by supporting batch conversion, preserving folder hierarchy, maintaining email formatting, and reducing the chances of data loss. Choose the method that best matches your requirements and the size of your Outlook mailbox.

Frequently Asked Questions

Q1. Can I convert an OST file to PDF without Outlook?
Ans. Manual methods generally require Microsoft Outlook. However, many professional OST Converters can process accessible OST files without needing an active Outlook profile.

Q2. Does Outlook have an export to PDF option?

Ans. Outlook doesn't provide a direct bulk export feature. You can save individual emails as PDF using the Print option.

Q3. Can I convert multiple OST emails into PDF at once?

Ans. Not with manual methods. Batch conversion typically requires an automated DRS Softech OST to PDF Converter.

Q4. Will attachments be included in the PDF?

Ans. Manual methods do not embed attachments within the PDF. Professional tools Like DRS Softech OST to PDF Converter Tool preserve attachment references or export them separately, depending on the software.