Turn an STP CAD model into an STL mesh. Curved surfaces are meshed finely enough to stay smooth, and the part keeps its real size and orientation.
Fine, accurate meshing of curved surfaces
Real size and right way up
Runs on your computer: nothing is uploaded
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Drop an STP file or
Files stay on your computer.
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How to convert STP to STL
Add your STP file
Drop it on the converter above or click browse. It opens in your browser, so nothing is uploaded.
Check the format is STL
STL is already selected. You can switch to any other output from the menu.
Convert and download
Click Convert and your STL file is ready in seconds. Download it straight away.
What is STP?
STEP stores exact CAD geometry: true planes, cylinders, cones and freeform surfaces joined into solids. It is the standard way to move parts between CAD systems such as SolidWorks, Fusion 360, Inventor, CATIA and FreeCAD.
Full name
ISO 10303 (Standard for the Exchange of Product Data)
STL describes a surface as a list of triangles, with no colour, material or unit information. It is the default file for 3D printing and is exported by almost every CAD and modelling program.
STP stores exact surfaces; STL needs triangles. We mesh each surface with a deviation of 0.05% of the part's size, which keeps holes and fillets smooth for printing and rendering.
Dimensions stay in the units of the original file, usually millimetres.