.NTF File

The ntf file extension is associated with the Lotus Notes collaborative software for Microsoft Windows, Linux and Mac OS X (macOS) developed by IBM.

The ntf file stores database template with predefined settings to quickly create files based on same parameters.

The server side of Lotus Notes is called Lotus Domino.

MIME types:
application/vnd.lotus-notes

Files with ntf file extension can be usually found as database templates from Lotus Notes collaborative software by IBM.

How to open:

Use Lotus Notes to open and work with *.ntf database templates.

How to convert:

Templates are used to create finished documents/databases based on the same settings. Once done, some sort of export is usually possible.