Kernel OST to PST Converter converts inaccessible, orphaned or damaged Outlook OST files to PST and other formats with full data accuracy.
- for
- IT admins, Outlook users, and enterprises needing email data recovery or migration.
- pricing
- freemium · free trial
Key features
- Bulk conversion — Convert multiple OST files to PST, EML, MSG, DBX, MBOX, etc., quickly using multi-thread architecture.
- Corrupt file repair — Repair damaged or inaccessible OST files and save them as healthy PST files.
- Selective export — Filter by date, item type, subject, etc., to export only chosen items.
- Direct migration — Save converted data directly to Office 365, Exchange Server, Gmail, Yahoo and other email platforms.
- Folder hierarchy preservation — Maintain original folder structure, metadata, read/unread status and rich-text formatting.
- PST splitting — Split large PST files into smaller parts (e.g., 1-10 GB) for easier management.
Use cases
- Recover deleted emails and attachments from a corrupted OST file for a departed employee.
- Migrate an on-premises Exchange OST mailbox to Office 365 or Gmail without data loss.
- Backup large Outlook OST archives by converting them to split PST files for long-term storage.
Kernel for OST to PST Converter FAQ
How many items can I convert with the free trial?+
The free trial allows conversion of up to 25 items per folder.
Can the tool recover deleted items?+
Yes, it can recover accidentally deleted emails, contacts, and other items and marks them in red during preview.
Does the converter preserve folder structure?+
It preserves the original folder hierarchy, metadata, read/unread status and rich-text formatting in the output PST.
Can I export directly to cloud email services?+
Yes, you can save converted data directly to Office 365, Exchange Server, Gmail, Yahoo and other supported platforms.
Is there a size limit for OST files?+
The software has no OST file size or item limitations; it can handle large files and split resulting PSTs as needed.
Summarized by DevHunt from nucleustechnologies.com · Oct 4, 2026. Details may change; check the official site.
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