Code Editor — G

: A free, lightweight favorite for heavy text editing. With plugins like NCneticNpp , it gains 3D simulation and specialized syntax highlighting.

: An excellent free option for users who want to modify post-processors. Extensions like Autodesk Fusion 360 Postprocessor allow you to click a line of G-code and jump directly to the code that generated it. G CODE EDITOR

: Features like backplotting allow you to see a 3D wireframe or solid simulation of the toolpath before running it on a machine, helping to prevent costly crashes . : A free, lightweight favorite for heavy text editing

: For long-term reliability, it's often better to re-post from your CAM software than to hand-edit, as manual changes can be lost if you need to regenerate the program later. : A free