GCodex

What it does

GCodex is a free, browser-based G-Code viewer and simulator. No upload required, no signup needed. Features: - 3D & 2D toolpath visualization - Layer-by-layer inspection - Works with CNC machines and 3D printers - Supports Marlin, Klipper, and standard G-Code - Faster and cleaner than NCViewer and gcode.ws Just paste or load your G-Code file and instantly visualize your toolpaths. Perfect for makers, engineers, and hobbyists.

GCode: the best free online G-Code viewer and CNC machine simulator. View, analyze and simulate G-code toolpaths in 3D/2D, inspect layers, verify CNC and 3D printer files — no upload, no signup. Faster than NCViewer. Better than gcode.ws.

Print Analysis Detailed G-code inspection & metrics Extrusion per Layer Command Frequency File Converter Export your loaded G-code as another format — all processing happens in your browser Select Output Format G-Code Standard CNC / 3D printer .gcode NC File CNC machine control code .nc STL Toolpath mesh — ASCII STL .stl OBJ Wavefront 3D mesh object .obj SVG 2D vector toolpath top view .svg CSV Path data table per segment .csv JSON Structured path data (API-ready) .json Plain Text Raw G-code, comments stripped .txt G-Code: Exports your file as-is. Use for re-download or sharing with a machine. Download File Copy to Clipboard STL / STEP / OBJ → G-Code Converting 3D model files (STL, STEP,…from gcodex.tech

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