A .g file holds G-code - the movement instructions for a 3D printer or CNC machine. Produced by slicers and CAM software. Analyser rebuilds the printed object from a .g file by drawing every extruded move as solid filament, the way a slicer preview does. Analyser handles .G alongside related formats such as .GCODE, .GCO, .NC and more. In Analyser's format library, .G sits in the 3D / CAD / engineering category.

How do I open a .G file?

Drop a .G file onto Analyser at https://lab.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. 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.

Can I open a .G file online for free?

Yes. Analyser is a free online .G opener and viewer that runs entirely in your browser - your .G file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.G file - what it is and how to open it online

Click here to analyse any file

Home › Formats › .GFull

What is a .G file?

A .g file holds G-code - the movement instructions for a 3D printer or CNC machine. Produced by slicers and CAM software.

Did you know: Analyser rebuilds the printed object from a .g file by drawing every extruded move as solid filament, the way a slicer preview does.
Analyser handles .G alongside related formats such as .GCODE, .GCO, .NC and more.
In Analyser's format library, .G sits in the 3D / CAD / engineering category.
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 .G file: Drag a .G 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.
Related formats: .GCODE · .GCO · .NC · .NGC · .TAP · .CNC. See all supported file types.