You can convert .fz to a more accessible format:
or a general-purpose utility—here is a review from the perspective of a user looking for a lightweight, versatile tool. Review: FZ File Viewer – A Must-Have for Quick Previews Rating: ★★★★☆ (4/5) The Quick Take: fz file viewer
Since an FZ file is just a part of a larger project, you typically don't open it alone. A FZ file viewer (like the Fritzing application itself) reads this data to visually reconstruct your invention so you can: Verify that your wires aren't crossed. You can convert