Cathryn Lee
Kernel OST Viewer is a free OST viewer tool made to read Outlook OST files, including orphaned, inaccessible, and corrupted files.
- Status: ✅ Active & Verified
- Last Checked: May 2026
- Offer: Up to 75% Off
- Code: VW***30
📄 Licensing & Support Details
- 30-day money-back guarantee
- Delivery key via email in 15 minutes.
- 24/7 Customer Support
- Secure Checkout
- For individual use.
- License validity & updates: 1 Year
📝 How to apply
Click ‘Copy Code’ above to proceed to checkout. Verify the promotional price and complete your order.
What is Kernel OST Viewer?
Kernel OST Viewer is built for reading Outlook OST files without requiring an Exchange Server connection. It can scan and preview mailbox content from healthy, orphaned, inaccessible, and corrupted OST files while keeping the original message structure and formatting intact.
In-Depth Review & Features
- Access OST files without Exchange Server: lets you open Exchange offline folders and preview mailbox data without connecting to Microsoft Exchange Server.
- Support for corrupt, orphaned, and inaccessible files: scans and displays content from different OST file conditions.
- Mailbox item preview: shows emails, calendars, notes, tasks, journals, contacts, drafts, deleted items, and other mailbox content.
- Original layout preservation: keeps the original email structure and formatting during preview.
- Smart filters: help locate email items by From, To, Subject, Date Range, Attachments, and Lost/Deleted status.
- Email sorting options: sorts messages by attributes such as From, Subject, Date/Time, and Lost/Deleted.
- HTML export for item lists: allows the free version to save email lists, calendar entries, contacts, and similar data in HTML format.
- Multiple format saving in Pro version: supports saving selected emails in HTML, PDF, MSG, EML, and RTF.
- Automatic OST search: searches a selected drive location and lists OST files found there.
- Multiple OST file loading: allows users to add and open multiple OST files at once.
- File Analysis Reports: generates reports for item types, mail flow density by date, mail flow by senders, and user interaction.
- Large OST file access: supports viewing large OST files, including 20 GB, 50 GB, and 100 GB sizes.
- Lost and deleted email preview: displays deleted emails in red font while preserving message format and attachments.
- Dedicated mailbox item buttons: provide direct access to Calendar, Contacts, Task, Journal, and Notes folders.
Pros & Cons
More screenshots
Frequently Asked Questions
What is the best Kernel OST Viewer coupon available now?
WinningPC offers the biggest discount: 75% off the Bundle. The Personal License is available with 30% off.
Does Kernel OST Viewer need an Exchange Server connection?
No. The tool is designed to access and read OST files without an Exchange Server connection.
Can Kernel OST Viewer open orphaned OST files?
Yes. The software is made to view orphaned, inaccessible, corrupt, and healthy OST files.
Can I view attachments in OST emails?
Yes. You can select a folder, choose the email in the right pane, and then double-click the attachment in the preview section to open it.
Can I search for my OST files automatically?
Yes. The software includes a Search option that lets you specify a drive location and fetch available OST files from that location.
Can I sort emails by sender name or other fields?
Yes. The tool allows sorting emails by parameters such as From, Subject, and Date/Time.
Is Kernel OST Viewer free?
The software is listed as Free with a Free license type, and the FAQ states that the freeware is available at no cost for accessing an unlimited number of Outlook OST files.
Can I read very large OST files with it?
Yes. The tool is described as having no OST file size limit and can access files sized 50 GB, 100 GB, 150 GB, or more.
What mailbox components can I preview with this OST Viewer?
You can preview emails, attachments, contacts, calendar items, notes, tasks, and journal entries.
Technical Specifications
| Hard Disk | 50 MB disk space. |
| Memory | 64 MB RAM (128 MB recommended). |
| Processor | Intel Pentium compatible (x86, x64) or equivalent. |
| Operating System | Windows 365, 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, 95, and Windows Server 2022, 2019, and older versions. |
