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STEP GCODE
Not possible

Convert STEP to GCODE

Can you convert STEP to GCODE?
Verified by Adam B.· reviewed by FE Editorial ·updated Jul 18, 2026
QUICK ANSWER
Is it possible to convert STEP to GCODE?
No - not a direct conversion.

The standard path is: export the .step to .stl in a CAD tool such as FreeCAD, then open the .stl in a slicer (Cura, PrusaSlicer) to generate G-code configured for your specific machine. No tool automates this without user-defined machine and print settings.

No direct path
Also to GCODE: STL · DXF · CNC

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert STEP to GCODE?

A .step file (ISO 10303) contains precise boundary-representation geometry with no manufacturing information. G-code is a list of machine-specific movement instructions (tool positions, feeds, temperatures) that differ between every printer or CNC machine. Converting requires tessellation to a mesh and then slicer or CAM processing - neither step can be performed automatically without user input about the target machine.

How to convert STEP to GCODE

FreeCAD (export to STL, then slice) FREE

Open the .step in FreeCAD and export the model as .stl via File > Export. Then open the .stl in a slicer such as Cura or PrusaSlicer, configure settings for your printer, and generate G-code.

Fusion 360 CAM workspace APP

Import the .step into Fusion 360 and switch to the CAM workspace to define tool paths and machine settings for CNC milling. This requires configuring tools, operations, and feeds - it is not a one-click conversion.

About these formats

.STEP STEP - Standard for the Exchange of Product Data (ISO 10303)

A STEP file is a 3D CAD model stored in the ISO 10303 neutral format so engineers can share geometry between different CAD programs. To view one for free, use FreeCAD, CAD Assistant, or…

Open .STEP details →
.GCODE G-code File

A .gcode file holds machine instructions -- coordinates, speeds, temperatures, and tool commands -- produced by slicer software for a 3D printer or CNC machine. Open it in Ultimaker Cura,…

Open .GCODE details →

Quality & what to watch

  • G-code is machine-specific - G-code generated for one printer or CNC machine cannot be used on a different machine without modification.
  • The conversion from .step to G-code always requires tessellation to a mesh format (.stl or .3mf) as a mandatory intermediate step.
  • Slicer default settings may not suit your printer; always verify layer height, temperature, and support structures before sending G-code to a machine.

Frequently asked questions

Can I find an online tool that converts STEP directly to G-code?
Any tool claiming one-click STEP-to-G-code either runs a silent STL-slicer pipeline with generic defaults - which may damage some printers - or produces unusable output.
Can Fusion 360 go directly from STEP to G-code for CNC milling?
Fusion 360 can import STEP and generate CNC G-code via its CAM workspace, but you must define the machine, tool library, and operations manually.
Why do I need a slicer if my CAD tool can export STL?
A slicer translates mesh geometry into the exact movement commands, temperatures, and speeds your specific printer needs - exporting to .stl only produces the shape.