G-code Viewer
See the toolpath of a CNC program and estimate its time
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Nothing is uploaded — every step runs in your browser.
Draw the toolpath of your Fanuc, Mitsubishi, Siemens 840D, Haas or GRBL G-code: cutting and rapid moves, arcs (I/J/K/R/CR), drilling cycles, total path length and estimated time. Supports mill, laser, wire EDM and lathe (ZX) programs.
How it works
- 1Choose your G-code file (.nc, .tap, .mpf, .gcode…).
- 2Pick the machine type (detected automatically).
- 3Press “G-code Viewer”, play the simulation and download the SVG preview if you like.
Frequently asked questions
Is my file uploaded to a server?
No. Everything runs in your browser; your file never leaves your device.
Which codes are interpreted?
G0/G1/G2/G3, G17/G18, G20/G21, G90/G91, G81–G89 drilling cycles, Siemens MCALL CYCLE8x and CR=. Machine-specific macros and cycles are not drawn.