Image to CNC File: Convert a Picture to G-code, DXF or SVG Online

Image to G-code converter: the complete guide

Most people who convert image to G-code want one thing: machine geometry in real millimetres or inches, the right way up, with closed contours. Not every converter delivers it; plenty write coordinates in pixels with no units, upside down, with outlines that do not close. Here is what this one does differently, and how to get the best G-code out of your image.

Searching for image to cnc file online lands you here too. The steps are short: drop your image into the box above, check the result, and download a G-code when it looks right.

Image and G-code: what changes

• Image: Any picture file: a PNG, a JPG, a WebP, a HEIC from a phone or a scan. A picture is pixels, so it has to be traced or redrawn before a machine or a vector program can use it.
• G-code: Motion commands a controller runs directly: move here, at this speed, with the tool on. No interpretation left. The machine does exactly what the file says.

How the Image to G-code converter works

Your image is first traced in the browser into clean outlines. For a machine the trace is set up for cutting rather than colour: one outline where a cutter should go, with photos turned into line art instead of blotchy shapes.

The outlines are then scaled to the real size you choose and written as a G-code. The G-code is conservative: the tool is off before every reposition, retracted before every rapid, and the program ends tool-off and clear. You can see the toolpath before you download, cuts solid and rapids dashed.

What the G-code is used for

• Laser cutting and engraving
• CNC routing
• Sending straight to the controller

Why convert Image to G-code here

• Real units in the file. G-code output carries millimetres or inches, so it imports at the size you set.
• The right way up. Image coordinates run downwards; machine coordinates run upwards. The conversion flips them so the part is not mirrored.
• Preview the machine file itself. The download is parsed back and drawn, so what you see is what the machine will get.
• Nothing uploaded. Drawings for clients stay on your machine.

Tips for the best G-code

• If you have the same picture in several formats, PNG is usually the cleanest source.
• High-contrast image artwork gives the cleanest toolpaths: dark shapes on a light background.
• For a laser, decide whether each shape should be cut or engraved in your laser software; the file gives you clean outlines for either.
• Run a test cut on scrap before cutting good material, as you would with any new file.

On the blog: Image to CNC File Converter: Everything You Need to Know