55% Off Stellar Converter for OLM Coupon May 2026

Now, I don’t get a headache when switching from Outlook for Mac to Outlook for Windows. Stellar Converter for OLM can help me solve the issue. This OLM to PST converter tool enables the conversion of OLM files to PST format, preserving every email, attachment, contact, calendar entry, and note intact, while maintaining the original folder hierarchy and integrity.

Along with PST exporting, the software also exports to MSG, EML, PDF, HTML, and RTF, with the Technician edition adding direct migration to Microsoft 365. The preview function enables you to verify conversions before saving, providing confidence in the results. With the Technician edition, Stellar Converter for OLM delivers several functions, including export capabilities to Microsoft 365, as well as support for PDF, HTML, and RTF formats, making it ideal for cross-platform backups or migration workflows.

Verified in May 2026: Don’t forget to use the Stellar Converter for OLM coupon code STEL***R10 at checkout to enjoy a 55% discount!
Stellar Converter for OLM Standard
Stellar Converter for OLM Standard
10% coupon code: regular price: $39, discounted price: $35.10
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Stellar Converter for OLM Technician
Stellar Converter for OLM Technician
55% coupon code: regular price: $199, discounted price: $89.10
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Stellar Converter for OLM
55% Off Stellar Converter for OLM Coupon May 2026 1
  • Converts all mailbox items, emails, attachments, contacts, calendars, tasks, and notes from Outlook for Mac (.OLM) into Outlook PST format with 100% data integrity.
  • Handles oversized OLM files without file size limitations, ensuring smooth conversion for bulk or archive mailboxes.
  • Maintains folder hierarchy, subfolder arrangement, and metadata exactly as in the original OLM file.
  • Standard edition exports to PST, MSG, and EML. The Technician edition adds PDF, HTML, and RTF export options.
  • Uploads converted OLM mailboxes directly to Microsoft 365/Office 365 accounts, preserving folder organization.
  • Automatically scans and lists all OLM files on your system when you don’t know their exact location.
  • Displays a three-pane preview of converted mailbox items, allowing you to verify content before exporting.
  • Apply filters to export only specific folders, date ranges, or email addresses, reducing conversion time.
  • Automatically splits PST files at around 45 GB for better performance in Outlook.
  • Generates detailed logs of the conversion process for auditing or troubleshooting.
  • Works with OLM files from Outlook 2021, 2019, and earlier for Mac; output PSTs are compatible with Windows Outlook 2021, 2019, 2016, and older.
PROS
  • Preserves folder hierarchy, email formatting, metadata, and attachments exactly.
  • Successfully converts OLM files over 50 GB without performance issues.
  • Standard supports PST, MSG, and EML; Technician adds PDF, HTML, RTF, and Microsoft 365 export.
  • Locates OLM files automatically when you don’t know the path.
  • Export only specific folders, dates, or email addresses to save time.
  • Splits files around 45 GB for better Outlook performance.
CONS
  • Outlook must be installed to generate PST files.
  • You can preview but not edit data before saving.
  • The free version only previews items; saving requires a paid license.

Conclusion – Is Stellar Converter for OLM Worth It?

If you’re moving Outlook for Mac data to PST, I recommend trying Stellar Converter for OLM. For me, it’s been quick and extremely accurate, and it keeps my folders and message details exactly as they should be. I love that I can preview before saving, so I know I have the right information. If you’re just doing a basic OLM to PST conversion, the Standard edition will do the job. However, if you require additional formats or a Microsoft 365 export, let’s choose the Technician edition.

Review by Laura Marano – tech writer and software reviewer at WinningPC.

Step 1. Select Your OLM File
On the home screen, click on the “Select OLM Mailbox”. Click on the “Browse” button to locate your OLM file. If you’re not sure where it is, use the Find option to search your system.

Step 2. Start the Conversion
After selecting the file, click Convert. The software will scan your OLM file and extract all mailbox items.

convert stellar converter for olm
55% Off Stellar Converter for OLM Coupon May 2026 2

Step 3. Preview the Data
Once the scan is complete, you’ll see a preview in three panes: folders on the left, email lists in the middle, and detailed content on the right. Review the data to confirm accuracy.

preview stellar converter for olm
55% Off Stellar Converter for OLM Coupon May 2026 3

Step 4. Choose What to Save
Select the folders or items you want to export. You can convert everything or filter by date, sender, or folder.

Step 5. Save the Converted File
Click Save Converted File. Choose your desired format: PST, MSG, EML, PDF, HTML, or RTF (depending on your edition). Select a destination folder, then click OK to begin saving.

save option stellar converter for olm
55% Off Stellar Converter for OLM Coupon May 2026 4

Step 6. Open in Outlook
If you exported to PST, open Outlook and import the file to start using your converted mailbox.

Can I migrate my Mac Outlook data directly to Microsoft 365?

Yes. The Technician edition includes a direct export option to Microsoft 365, keeping the folder hierarchy intact.

Does the software keep my email formatting and attachments?

Absolutely. It preserves your original formatting, inline images, attachments, metadata, and folder structure.

How large of an OLM file can it handle?

There’s no fixed size limit; users have reported successful conversions of files over 50 GB.

Do I need Outlook installed to convert to PST?

Yes, Outlook should be installed on your Windows system to generate and open the PST file.

What’s the difference between the Standard and Technician editions?

Standard converts to PST, MSG, and EML. The Technician edition adds PDF, HTML, and RTF exports and direct Microsoft 365 migration.

How can I get a discount when buying?

If you purchase through WinningPC, you can use the coupon code STE***R10 to get up to 55% off.

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8Expert Score
Good

In conclusion, Stellar Converter for OLM helps you convert Outlook for Mac OLM files into usable formats, so you can open your mailbox in Windows Outlook or other compatible apps. It ensures the original folder structure and metadata remain intact.

Overall
8
Functionality
7.8
Ease-of-use
8
Customer Support
8
5/5 - (268 votes)

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Laura Marano
Laura Marano

Laura Marano is the Content Manager at WinningPC with over 7 years of experience in software testing, content strategy, and digital marketing. She specializes in hands-on reviews of tools ranging from data recovery software to productivity solutions, ensuring every article is based on real user experience. Laura is passionate about helping readers choose the right software while saving money through verified coupon codes and exclusive giveaways. She collaborates directly with software developers to bring authentic deals to users. When not testing new tools, Laura shares her insights on LinkedIn, contributing to discussions about tech, and content strategy.

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