MIT – Free for personal and commercial use.
For integration into scripts/pipelines:
fzviewer --input scan_01.fz --export-png output.png --width 1920
fzviewer --batch list.txt --export-format tiff --quiet
fzviewer --info data.fz --json > metadata.json
The FZ File Viewer is a cross-platform utility designed to open, parse, and render .fz files—a proprietary or specialized compressed graphics format (often associated with Fritz or Fzy imaging, or custom scientific data packing). Unlike generic viewers, this tool provides pixel-accurate decoding, layer inspection, and metadata extraction without requiring the original authoring software. fz file viewer