💡 Pro-Tip for Makers: Always inspect toolpaths in your controller simulator (UGS, LightBurn, Candle) before starting your laser or CNC spindle.View all 15+ CAD & CNC tools

How to Use

Upload SVG

Upload the vector artwork for laser engraving or cutting.

Set laser parameters

Set laser power (0–255 or 0–1000), feed rate, and choose laser mode (GRBL M3/M4, Smoothieware, or Marlin).

Download and engrave

Download the G-Code and send it to your laser via LaserGRBL, LightBurn, or bCNC.

SVG to G-Code for Laser Engravers and Cutters

Laser engravers use a subset of G-Code that is slightly different from CNC routers. Instead of spindle speed (RPM), lasers use power (0–255 for most GRBL controllers). Instead of Z-axis plunges, the laser is turned on (M3 or M4) and off (M5) as it follows the SVG paths.

This converter generates G-Code specifically for laser operation, with proper laser on/off commands, power settings, and feed rate. It supports the three major firmware variants: GRBL (the most common for diode lasers), Smoothieware (used in many Chinese CO₂ lasers), and Marlin (common in converted 3D printers).

Real-World Examples & Use Cases

Diode Laser Engraving

Engrave a logo or decorative design on wood or leather using a diode laser and GRBL firmware.

CO₂ Laser Cutting

Cut acrylic shapes from an SVG design using a CO₂ laser cutter.

Frequently Asked Questions

What is the difference between M3 and M4 in GRBL laser mode?▼

M3 (constant power) keeps the laser at the same power regardless of speed. M4 (dynamic power) scales laser power with speed — this produces better results on curves and corners.

How do I find the right power and speed?▼

Run a power/speed test grid on your material. Start at low power and increase until you achieve the desired mark or cut.

Does this support image engraving?▼

This tool is for vector (SVG path) engraving. For raster image engraving, you need a separate tool.

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