What is a .GCO file?
A .gco file is G-code for a 3D printer or CNC machine. Produced by slicers like Cura and PrusaSlicer.
- Did you know
- The clipped .gco name exists because many 3D-printer firmwares read SD cards using DOS-style 8.3 filenames, leaving room for only three letters after the dot.
- The “G” in G-code marks a preparatory command, the family of moves and modes the controller prepares before acting.
- Alongside G-words, M-words handle miscellaneous functions such as turning a spindle, fan or coolant on and off.
- What Analyser shows you
- Reconstruct and visualise the printed (or machined) object straight from G-code: every extruded move is drawn as a line in an interactive WebGL viewer, height-coloured and Z-up, with a build-height scrubber to peel the print back layer by layer. Works universally across slicers (PrusaSlicer, SuperSlicer, OrcaSlicer, Cura, ideaMaker, Bambu Studio, Simplify3D) and CNC / laser CAM, handling absolute and relative moves, inch and millimetre units, and G2/G3 arcs; travel moves are separated out. Reads the slicer or CAM tool, object size, layer count and height, filament or cut-path length, feedrate range, and nozzle/bed temperatures.
- Open a .GCO file
- Drag a .GCO file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.