Launched January 6, 2026
WholeClear OST to NSF Converter Software

WholeClear OST to NSF Converter Software

Convert Outlook OST files to NSF format in bulk with WholeClear

One time fee273 impressions#1355 of its week1 comment

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  • David Johnson· 3mo ago

    An old OST file was sitting unused because I needed the data in Lotus Notes format. Finding a way to move those emails without starting over was the main challenge. This converter helped complete the transfer with less manual effort. I checked the converted files afterward, and the mailbox data looked organized. The trial option was useful before going ahead.

The WholeClear OST to NSF Converter Software is a professional way for converting OST emails to NSF format with attachments without hassle. It is easy to use for all users without technical knowledge because it has a user-frienldy interface. It is a professional approach to convert OST emails to Lotus Notes NSF files, and there were no issues. Users can choose where to store converted NSF files. To convert OST files to NSF format, Lotus Notes must be installed on your computer. Repairing and converting corrupted OST files to NSF without using Outlook. This software is compatible with all Windows OS and MS Outlook versions. It's easy to convert password-protected OST files to NSF files. Furthermore, users can try this software for free to see what it can achieve. The process of converting OST to NSF format for emails, notes, messages, contacts, and other data is quick and secure. To protect the data, broken OST files are converted to NSF files. Because they are compatible, OST files can be converted to NSF and viewed in any version of Lotus Notes. It keeps track of all of data while working with OST emails, notes, messages, contacts, and other NSF-formatted files.

Converts Outlook OST files to Lotus Notes NSF format in bulk, preserving emails, contacts, calendars and attachments.

for
IT admins and users needing to migrate Outlook data to Lotus Notes without Outlook installed.
pricing
freemium · free trial

Key features

6 features of WholeClear OST to NSF Converter Software
  • Full mailbox conversion — Exports emails, contacts, calendars, notes, tasks and attachments from OST to NSF.
  • Selective folder export — Choose specific folders or items to convert, excluding unnecessary data.
  • Preserve hierarchy and metadata — Keeps original folder structure, email headers and attributes intact.
  • No size limits — Handles large and multiple OST files without file-size restrictions.
  • Preview before conversion — Shows a preview of OST contents so users can verify data prior to export.
  • 24-hour online chat support — Provides round-the-clock assistance for installation and usage issues.

Use cases

  • Migrate a user's Outlook archive to Lotus Notes after Outlook decommissioning
  • Recover data from a corrupted OST file by converting it to NSF
  • Bulk convert multiple departmental OST files to NSF for Lotus Notes migration

WholeClear OST to NSF Converter Software FAQ

Do I need Outlook installed to convert OST files?+

No, the converter works without Outlook or Exchange Server installed.

What version of Lotus Notes is required?+

Any version of Lotus Notes (e.g., 10.0, 9.0, 8.5) must be installed on the computer.

Can the tool handle password-protected OST files?+

Yes, it can convert password-protected OST files to NSF.

Is there a limit on the number or size of OST files I can convert?+

There is no file-size limit and you can convert unlimited OST files, though one file is processed at a time.

Does the conversion retain email attachments and metadata?+

All email components, attachments, headers and folder hierarchy are preserved during conversion.

Summarized by DevHunt from wholeclear.com · Sep 28, 2026. Details may change; check the official site.