Which file to prepare for laser cutting?

Choosing the right file affects the quality of the cut and the ease of working with your machine. Below you’ll find some tips.

Use vector formats

Laser cutting and engraving require vector files. The most popular are DXF and SVG. DXF was created as a CAD exchange standard and contains only vector geometry – lines, arcs and splines. This makes it precise and ideal for industrial plotters and CNC machines.

SVG, on the other hand, is an open web standard that stores colours, fills and text in addition to geometry. Colour layers can help separate cutting, engraving and marking operations, but too many styles sometimes confuse simpler control programs.

Set correct dimensions and convert text to outlines

When preparing your design, make sure you're using the right units (millimetres are best) and that everything is to scale. Convert text and fonts to outlines to avoid missing font issues on the controller computer. Closed contours make it easier for the program to distinguish between cutting and engraving areas.

Check software compatibility

Different lasers and programs have their preferences: Glowforge machines handle SVG files best because they recognise coloured layers and automatically assign operations. LightBurn supports both formats, but for precise cuts with many layers DXF works better.

Finally remember: the file format doesn’t affect the cut quality – the key is laser power, speed and focus settings. Choose the format that works best with your software and adjust your machine’s parameters for the rest.