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Convert STL file to G-code | FullyFreeTools

Convert STL file to G-code

Turn 3D models into printer-ready G-code. Convert your STL files to G-code online for free using our STL file to Gcode converter.

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Convert STL to G-code

How to convert STL to G-code Online

  1. Upload your .stl model using the form above.
  2. Click Convert STL to G-code to slice the model.
  3. Download the generated .gcode and load it on your printer.

Notes

  • Actual slicing requires a slicer engine (e.g., CuraEngine/Slic3r). If unavailable, we’ll show a friendly notice.
  • For precise results, configure layer height, temperatures, and speeds in a slicer app.

Frequently Asked Questions

Which slicer do you use?
We rely on open-source slicers like CuraEngine or Slic3r when available on the server.
Can I set printer profiles?
Profiles and advanced parameters are best configured in a dedicated slicer app before uploading.
Is my model stored?
No. Files are processed transiently and are not persisted.
Can I convert OBJ or 3MF to G-code?
This page targets STL. Convert your model to STL first (most CAD tools can export STL) and then upload it here.
What printer profiles are supported?
Common FDM printers are supported by open-source slicers. For exact temperatures, speeds, and retraction values, configure a profile in Cura/PrusaSlicer and slice locally.
Why does slicing fail sometimes?
Non-manifold meshes, self‑intersections, or huge polygon counts can cause failures. Repair the mesh in Meshmixer/Netfabb and try again.
Is G-code the same for all printers?
Most FDM printers accept similar G-code, but parameters (temperatures, speeds, retraction) must match your material and machine.

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