GCodeMaker

A free, open-source syntax-marking code editor for writing G-Code to run all your CNC machines.

Crystal-Clear Syntax Highlighting

• G & M Codes, coordinates, parameters and comments each get their own color
• Live error flags for typos or unsupported commands
• Annotation pane that describes your G-Code in human readable language

Rich Macro & Dictionary Support

• Editable macros for everything from drill cycles to tool-change sequences
• Full G-Code dictionary sidebar – double-click any code to see its definition
• Customize or extend with your own macro sets

Offline-First, Non-Subscription

• Runs on Windows with zero external dependencies
• No cloud, no AI – your programs stay local and private
• Ideal for secure shop floors or isolated networks

Fast, Free, and Open-Source

• Lean UI written in Python & Qt for snappy performance
• Free standalone software for writing your G-Code
• Open-source and available via the MIT License: link here