Standalone PrusaSlicer G-code Viewer is a lightweight application, which you can use to quickly preview G-codes from all popular slicers…
Feature Request] Show estimated length of filament used in G-code Viewer · Issue #5980 · prusa3d/PrusaSlicer · GitHub
A Guide on how to use Conical Slicing — CNC Kitchen
gcode viewer - online gcode viewer and analyzer in your browser!
PrusaSlicer G-code Viewer: Unknown file format. Input file must have .stl, .obj, .amf(.xml) or .prusa extension. · Issue #8627 · prusa3d/PrusaSlicer · GitHub