G-code translator + toolpath preview

Paste CNC G-code (LinuxCNC) or 3D-printer G-code (Marlin) and read it as plain English alongside a top-down toolpath preview. Everything runs in your browser, with no upload and no logging.

G-code source

gcode / nc / tap

Upload

Dialect

Translates as you type. Inline (parens) and ; end-of-line comments pass through.

Stats

axis units = whatever the file uses

Line by line

Decoded breakdown will appear here as you type.

Toolpath

top-down (XY)

Travel (G0)Cut / extrude (G1/G2/G3)Drag to pan / pinch or wheel to zoom

Covers ~250 G/M codes from the LinuxCNC reference and Marlin firmware, including fractional codes (G5.1, G38.2, G91.1) and dialect-specific addresses (E for filament, S for fan/heater/spindle, etc). Toolpath preview supports G0/G1 and G2/G3 arcs in center- and radius-mode.