SVG for Laser Cutting: How to Create and Prepare Files
Prepare perfect SVG files for laser cutters — from vectorizing images to setting up cut, engrave, and score paths correctly.
Why Laser Cutters Need SVG Files
Laser cutters work by following vector paths — they move the laser head along mathematical curves and lines. SVG provides exactly this: precise, scalable path data. Raster images (PNG, JPG) have no path information and cannot be cut (only engraved at lower quality).
Setting Up Layers for Cut, Engrave, and Score
Most laser software (LightBurn, xTool Creative Space, Glowforge) uses colors or layers to determine the laser operation. Standard conventions:
| Color | Operation | Laser Setting |
|---|---|---|
| Red (#FF0000) | Cut | Full power, slow speed |
| Blue (#0000FF) | Engrave / Raster | Lower power, fast speed |
| Green (#00FF00) | Score / Mark | Medium power, medium speed |
| Black (#000000) | Raster engrave | Default engrave settings |
Converting Images to Laser-Ready SVG
To convert a raster image (logo, artwork, photo) to a laser-cuttable SVG, vectorize it using our tool. Use the Line Art or Default preset for best results with clean outlines. Then open in Inkscape to assign correct colors and verify paths are closed.
- Use high-contrast black-and-white source images for cleanest traces
- Check that all paths are closed (important for cutting — open paths won't close-cut a shape)
- Remove any raster image remnants from the SVG file
- Set stroke color to your laser software's cut color, fill to none
- Scale to your target material dimensions before exporting
Kerf Allowance for Precision Cuts
Laser beams have a width (kerf) — typically 0.1–0.3mm. For friction-fit joints and precise assemblies, you must offset paths inward by half the kerf value. In Inkscape, use Path > Outset/Inset, or use the Offset function in LightBurn.
Common Laser Cutting Software
Different laser machines use different software. Ensure your SVG is compatible with your workflow.
- LightBurn — universal, supports most diode and CO2 lasers, imports SVG natively
- xTool Creative Space — for xTool machines, SVG import supported
- Glowforge — web-based, drag-and-drop SVG upload
- Inkscape — open-source design + LightBurn-friendly SVG prep
- Adobe Illustrator — professional SVG prep, AI to SVG export
Frequently Asked Questions
What resolution should laser cutting SVG files be?
SVG is resolution-independent — resolution doesn't apply. Specify dimensions in physical units (mm or inches) to match your material size.
Can I use a PNG for laser engraving?
Yes, for raster engraving (not cutting). But for vector cutting (the clean through-cuts), you must use SVG vector paths.
How do I check if paths are closed in my SVG?
In Inkscape, select a path and use Extensions > Generate from Path > Interpolate to check. Or visually confirm that the start and end nodes of each path connect.
Why does my laser cutter not follow the SVG path correctly?
The SVG may contain unsupported features like fills, gradients, or groups that the laser software interprets unexpectedly. Use stroke-only paths (fill: none) for cut lines.
What file format should I use for Glowforge?
Glowforge accepts SVG and PDF. SVG is preferred for cut projects. Use the Glowforge UI to assign cut, score, and engrave operations.
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