Free online STEP to SVG converter

Laser cutters, documentation systems, browser-based drawings, and vector editors commonly require SVG rather than a 3D CAD model. Converting a STEP file produces a selected 2D projection or face outline; it does not preserve an editable solid, feature history, or assembly structure.

STEP format

STEP, stored mainly as .step or .stp, is the ISO 10303 family of neutral CAD exchange formats. Mechanical CAD users exchange STEP files between systems such as SolidWorks, CATIA, Siemens NX, PTC Creo, Autodesk Inventor, Fusion, Solid Edge, Onshape, and FreeCAD.

STEP commonly carries boundary-representation solids, surfaces, component structure, names, colors, and some product-manufacturing information. AP203, AP214, and AP242 are widely used application protocols. Geometry usually transfers reliably, but assemblies, colors, PMI, validation properties, and other metadata depend on the source application and protocol.

A STEP model describes three-dimensional geometry, not a drawing sheet or cut path. Before exporting SVG, choose the required front, top, side, section, isometric, or planar-face view.

SVG format

SVG is an XML-based two-dimensional vector format used by web browsers, Inkscape, Adobe Illustrator, technical documentation tools, plotters, and compatible laser or vinyl-cutting software. It stores paths, strokes, fills, and text as scalable objects, avoiding raster-image pixelation when enlarged.

SVG cannot store a standard parametric CAD solid, feature tree, constraints, or assembly relationships. Its geometry is projected linework, so an SVG cannot be converted back into the original STEP model without losing information.

Convert the file

For a quick conversion, upload the .step or .stp file to 101convert.com, choose SVG, and download the output. If view or projection options are available, select an orthographic direction for measured or fabrication geometry rather than an isometric view.

Use FreeCAD when the output requires a controlled view, scale, or cleanup:

1. Open the STEP file with File → Open. In the model tree, hide components, fasteners, internal parts, and other geometry that must not appear in the SVG.
2. For a drawing view, switch to the TechDraw workbench and create a page with a default or custom template.
3. Select the required imported part or assembly and insert a view on the TechDraw page.
4. Set the view direction to front, top, side, rear, or another standard orthographic orientation. Set the scale explicitly; do not rely on the current 3D viewport angle.
5. Disable hidden lines for cutting profiles. Hidden edges add paths that can become unwanted toolpaths.
6. Select the completed TechDraw page and use File → Export to save SVG (*.svg).

A TechDraw export can include its template, page border, and title block. Remove these objects before sending the file to a cutter, or use a separate clean page for production geometry.

For a true cut profile, project a planar face normal to the cutting direction instead of exporting a general drawing or isometric view. FreeCAD's Draft Shape2DView can create a projected 2D object for export, but inspect it for duplicate and overlapping edges. If the native CAD model is available, exporting the original sketch or a dedicated drawing view is usually more reliable than deriving a profile from imported STEP geometry.

Check the exported SVG

Open the SVG in Inkscape or another vector editor and inspect the paths before fabrication. Remove title-block objects, dimensions, hatching, cosmetic threads, logos, tiny fillets, and geometry below the process tolerance; these details can create fragmented curves, excessive path counts, or invalid toolpaths.

Use orthographic views for dimensionally meaningful output. Isometric views are useful for visual documentation but do not provide true-size planar profiles. A general projection can also contain tangent edges, internal holes, overlapping assembly components, and duplicate lines.

Verify a known dimension after importing the SVG into the receiving application. SVG can use physical units, CSS pixels, and viewBox coordinates, and software may interpret millimetres, inches, and pixels differently.

For laser, waterjet, vinyl, or CNC profiling, check that contours are closed, paths are not duplicated, curves do not self-intersect, and inner cuts are processed before outer contours. Some CAM programs support DXF more consistently than SVG; use the format required by the receiving software.

STEP curves may export as Bézier curves or segmented paths. Inspect circles, splines, and small radii at high zoom, especially when the target controller has limited curve support. Convert text to paths only if the receiving system lacks the required font or requires outlined lettering; doing so prevents font substitution but makes text non-editable.