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SVG to STEP Converter

Turn a flat drawing into a CAD solid: upload an SVG (or a PNG/JPG logo, which we trace first), set the thickness and the real size, and get a STEP file with true curves, round holes as real circles and a checked, closed solid. See it in 3D before you download.

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Drop an SVG, PNG or JPG here or click to browse
SVG works best · PNG, JPG, WebP are traced · up to 25 MB
Choose drawing
1
Upload drawing
2
Thickness and size
3
Preview and download STEP
Real size
Width of the finished part in mm; the height follows the drawing's proportions.
Server-sideProcessed on our server, then deleted

Your file is uploaded to our server to be processed, so it does leave your device. Temporary files are removed as soon as processing finishes, and the uploaded original is deleted automatically within 120 minutes at the latest. Nothing is stored permanently.

About

A STEP file is what CAD programs exchange: exact surfaces, not triangles. This tool builds one from a flat drawing. Upload an SVG, enter how thick the part is and how wide (or high) it should be, and you get an extruded solid: a plate, a sign, a gasket, a stencil, a nameplate, a bracket outline or a logo badge, ready to open in SolidWorks, Fusion 360, Onshape, Inventor, FreeCAD or Rhino and to machine, laser-cut, mill or print. If your SVG states its size in millimetres, centimetres or inches, the part can keep exactly that size.

The geometry stays geometry. Straight lines become flat faces, curves become smooth B-spline faces, and circles and arcs in the drawing, which SVG stores as Bezier approximations, are recognised and written as true circles, so a 5 mm hole measures 5.000 mm in CAD and a rounded corner has a real radius. Long runs of curve pieces are joined into single edges, so the model has a few clean faces instead of hundreds of slivers. The drawing is read the way a browser shows it: fill rules (even-odd and nonzero), clip paths, transforms, CSS classes, reused symbols and stroked lines (which become walls of their stroke width) are all honoured, white shapes drawn on top cut holes, a page-sized background is left out, and text is turned into outlines.

Every result is checked before it is offered: the solid must be valid and closed, its volume measured on a fine mesh must equal the drawing's area times the thickness, and the written STEP must read back with the same bodies, faces and size. A file that fails is not handed out. You see the part in 3D, with its size, area, volume, number of bodies and the diameters of its round holes, before you download anything.

No SVG? Upload a PNG or JPG of a logo, icon or sign and it is traced into clean closed outlines first, with the same engine as our Image to SVG cut mode. Traced edges follow the pixels of the original, so for exact dimensions start from a drawing. The work runs in OpenCascade 8.0.1 inside a container with no network access; your file and the result are deleted after the download. One conversion a day is free; a credit pack, a 24-hour pass or a subscription covers more, shared with the other 3D tools.

How it works

  1. 1Open SVG to STEP Converter and choose your file or enter the required input.
  2. 2Check the settings and start the process.
  3. 3The tool creates the result with temporary server-side processing.
  4. 4Download the output or copy the result when it is ready.

FAQ

›Is the STEP a real CAD solid or a mesh?
A real solid (B-rep). Lines become planar faces, curves smooth B-spline faces and circles or arcs true cylinders, so CAD can measure, fillet, drill and dimension it. Nothing is triangulated in the STEP; the optional STL in the ZIP is the mesh, for printing.
›How do I set the size?
Enter the finished width or height in millimetres; the other side follows the drawing's proportions. If the SVG declares its size in mm, cm, in or pt, choose 'As in the SVG' and the part keeps that size exactly. Thickness is the extrusion depth.
›What happens to white shapes, lines and text?
The part looks the way the drawing does: white shapes painted on top become holes (switch this off to ignore colour), lines with a stroke width become walls of that width, a page-sized background rectangle is left out, and text is converted to outlines. The result lists each of these so nothing changes silently.
›Can I start from a PNG or JPG?
Yes. The image is traced into closed outlines first (dark shapes on a light background work best). Traced edges follow the pixels, so a scan or photo gives a slightly irregular outline; for exact holes and straight edges use an SVG drawn to size.
›Which checks are run before I can download?
The solid must pass OpenCascade's validity check with closed shells; its volume, measured independently on a fine mesh, must match area times thickness; and the STEP file is read back to confirm the same bodies, faces and size. If any check fails you get a message, not a broken file.
›Which programs open the file?
It is an AP214 STEP in millimetres, the most widely supported variant: SolidWorks, Fusion 360, Onshape, Inventor, Solid Edge, CATIA, Creo, FreeCAD, Rhino and KiCad's 3D viewer all read it.
›Can it build a 3D part from a technical drawing with several views?
No. It extrudes one 2D outline to a thickness, which covers plates, signs, gaskets and profiles. Reading front, top and side views with dimensions and reconstructing the part is a different, much harder problem that this tool does not claim to solve.
›Is my file safe?
It is processed in an isolated container with no network access and deleted together with the result after your download. Nothing is kept or shared.