GCodeEdit is an offline CNC G-code editor, analyzer, and simulator for Windows 11. Preview toolpaths in interactive 3D, simulate stock, inspect motion, and edit programs locally without uploading your files or creating an account. Use GCodeEdit as a focused CNC backplotter and program-review workspace. Inspect movements, coordinates, probe travel, stock simulation, and program structure before sending code to your CNC workflow. The syntax-aware editor includes G-code completion, navigation between diagnostics and source lines, and interactive toolpath replay. Review stock and height-map visualization, rotary A-axis workpieces, configurable machine profiles, and custom stock shapes such as contoured blanks. GCodeEdit stores its settings and user-selected files locally. It does not include advertising, analytics, telemetry, cloud accounts, or subscription services. Designed for machinists, CNC operators, makers, educators, and developers who want a focused desktop tool for understanding, editing, and analyzing G-code.