G-code Viewer
Open and inspect .gcode files in your browser. Free, no upload, no sign-up.
Open and inspect .gcode / .gco / .g / .nc files in your browser. Rotate, zoom, switch to wireframe and read exact dimensions. Nothing is uploaded.
How to view a G-code file online
- 1Drop the file
Drag your .gcode file into the box or click to pick it.
- 2Inspect
Orbit with the left mouse button, pan with the right, zoom with the wheel. Toggle wireframe to see the triangles.
- 3Read the numbers
The toolpath is drawn layer by layer.
About the G-code format
G-code is not a model format but a list of machine instructions: move here, extrude this much, set this temperature. Slicers produce it from STL or 3MF files. It can be visualised as the toolpath the nozzle will follow, but it cannot be reliably converted back into a clean 3D model.
Commonly used by: 3D printer firmware (Marlin, Klipper, Bambu), CNC controllers, slicer output
Extrusion and travel moves are drawn as line segments, layer by layer. Marlin, Klipper, PrusaSlicer, Cura and Bambu Studio output is supported.