Fzz Viewer ((free)) «2026 Edition»

It sounds like you're asking about a related to a "fzz viewer" — likely a file viewer for Fritzing files (which use the .fzz extension).

Since an .fzz file is just a renamed ZIP archive, you can technically "view" its contents using any archive tool (WinRAR, 7-Zip, macOS Archive Utility). fzz viewer