G-code Viewer
Preview sliced G-code and binary .bgcode in your browser, layer by layer. No upload, no account, and nothing leaves your device.
Drop a sliced .gcode or .bgcode file below to see the toolpaths your slicer actually produced — then drag the layer slider to step up through the print. Nothing is uploaded: the file is read and drawn on your own device.
Extrusion moves are drawn in cyan. Turn on travel moves to see where the nozzle jumps between them — useful for spotting stringing-prone paths and wasteful ordering.
Reads: .gcode, .gco, .g and .nc from any slicer that emits Marlin-style G-code — PrusaSlicer, Orca, Cura, Bambu Studio and friends — including arc moves (G2/G3), relative positioning and inch units.
Also reads PrusaSlicer's binary .bgcode directly, unpacking Heatshrink compression and MeatPack encoding in the browser — no conversion step.
On a Mac
The G-Code Viewer app adds Quick Look: press Space on any .gcode file in the Finder to preview it, with real thumbnails and no app to open.