.NWF File

File extension nwf is used for a 3D model format used by NavisWorks software, such as JetStream Roamer (also known simply as NavisWorks), a program that was meant to complement other CAD, like AutoCAD or Microstation.

The company was acquired by AutoDesk in 2007 and the software was probably incorporated into the company software portfolio.

NWF is one of the proprietary formats used by NavisWorks. An nwf file contains links to the original native files together with Autodesk Navisworks-specific data, such as review markups. No model geometry is saved with this file format; this makes NWF format considerably smaller in size than an NWD format.

NWF format is not backwards compatible, which means you cannot open newer version of an .nwf file in older NavisWorks program. However NavisWorks is able to save to two previous versions of the format. 

Files with the nwf extension can be mainly found as 3D model graphics used by the Autodesk NavisWorks software. A proprietary format without backwards compatibility.

How to open:

Autodesk NavisWork can open *.nwf files only if they have same version as the format is not backwards compatible.

How to convert:

NavisWorks probably can exports its own projects (*.nwf) to some exchange or publishing formats.