Viceversa Tools Launches Two-Way NSF To TGZ Converter For Lotus Notes And Zimbra Users

(MENAFN- Market Press Release) September 8, 2026 2:13 am - A new converter moves mailbox data between NSF, the format used by Lotus Notes and Domino, and TGZ, the archive format used by Zimbra, running in both directions from one Windows license.

Organizations still running Lotus Notes or Domino mail servers face a recurring problem when mail needs to move to a Zimbra environment, or back the other way: NSF and TGZ are unrelated file formats, and neither Lotus Notes nor Zimbra reads the other's native export without an intermediate step. ViceVersa Tools, a Windows software developer, has addressed this with the release of its NSF to TGZ Converter, available at, which handles the conversion in both directions under a single license.

The application reads an NSF file, the database format used by Lotus Notes, IBM Notes, HCL Notes, and Domino, and writes its contents into a TGZ archive, the compressed format Zimbra uses for mailbox exports. The same license also runs the process in reverse, converting a Zimbra TGZ archive back into an NSF file. According to ViceVersa Tools, either direction can be pointed at a single file or an entire folder, with source files added from more than one drive within the same job, and a selection step is included so a user can choose specific items to convert rather than processing a full mailbox by default.

The NSF-facing side of the tool carries a specific requirement: Lotus Notes must already be installed and configured on the machine running the conversion, since the application works through the existing Notes environment rather than replacing it. ViceVersa Tools states that this applies to jobs converting into NSF as well as jobs reading from it. The converter itself runs as a standalone Windows application and does not require a server connection to complete a conversion.
The company distributes the tool as a single installer covering both the NSF-to-TGZ and TGZ-to-NSF directions. Licensing follows the same structure used across ViceVersa Tools' other mailbox converters: a Personal license priced at $39 covers one machine with one year of updates, with Professional and Technician tiers available for organizations converting mail across multiple machines.

"Most of the requests we see for this pair come from IT staff handling a platform change, not an individual user," said a spokesperson for ViceVersa Tools. "The folder-level option and the ability to pick specific items exist because that kind of job is rarely just one clean file."

ViceVersa Tools sells its mailbox and archive converters as individual products, each built around one format pair rather than as part of a single general-purpose application. The company states that this approach makes it easier to keep each converter working correctly as the underlying mail platforms change, since updates to one format pair do not require changes to unrelated products in its catalog. Its software runs on Windows 11, 10, 8.1, 8, and 7, and is distributed directly through the company's website rather than through third-party marketplaces.

About ViceVersa Tools
ViceVersa Tools builds Windows software for converting mail and mailbox data between formats that do not read each other natively, including a set of tools built specifically around Lotus Notes, Domino, and Zimbra migrations. The company sells and licenses each format pair separately, with pricing tiers for individual users and for organizations converting mail on multiple machines.

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