NWC File

What are NWC files and how to open them

Are you having problems opening a NWC file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your NWC files.

What is a NWC file?

NWC files have multiple uses, and NoteWorthy Composer Song is one of them. Read more about the other uses further down the page.

NoteWorthy Composer Song

The .nwc file extension is most commonly associated with the NoteWorthy Composer notation authoring software. NoteWorthy Composer is a program for Windows computers that allows users to create, edit, record, print, and play musical scores. The NWC files can be loaded and played using the NoteWorthy Composer Viewer program.

How to open NWC files

We have identified two NWC openers that are compatible with this specific type of NWC file.

Programs that open NoteWorthy Composer Song files

Last updated: August 10, 2026

All known file formats using extension .NWC

While NoteWorthy Composer Song is a popular type of NWC-file, we know of 2 different uses of the .NWC file extension. Different software may use files with the same extension for different types of data.

Navisworks 3D Model

Navisworks 3D Model files with the .NWC extension serve as cache files created and maintained by Autodesk's Navisworks software. These files are generated automatically when native authoring files - such as CAD, Revit, laser scans, or IFC files - are opened, appended, or imported into a Navisworks session. Their purpose is to store a converted, optimized version of the model geometry and related display information so that subsequent loads are much faster, memory usage is reduced, and interactions such as navigating through the model, reviewing clashes, or visualizing scenes are more responsive.

These .NWC cache files are not editable in terms of Navisworks-specific review data - features like saveable viewpoints, markups, comments, or clash results are not stored in the .NWC itself. If those kinds of edits are required, the model must be saved or published using other Navisworks-native formats (such as .NWF or .NWD). Navisworks checks whether the original source file has changed since the .NWC was last created; if so, it re-generates the cache so the .NWC always reflects the latest version of the source.

Files with this extension begin with identifiable byte signatures that mark them as Navisworks cache files. These signatures are recognized by Navisworks exporters and readers to verify that a file is a valid .NWC before using its stored geometry.

NWC opener for Windows

We have identified one NWC opener that is compatible with this specific type of NWC file.

Various apps that use files with this extension

These apps are known to open certain types of NWC files. Remember, different programs may use NWC files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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