Do I need SolidWorks to make an STL?

No. Upload your .sldprt or .sldasm and convert to STL online — no SolidWorks license required.

Is the STL watertight for printing?

The converter tessellates solids into a closed mesh suitable for slicing; always preview before printing.

STL is a mesh, not parametric CAD. Keep the SolidWorks file or a STEP export for further edits.

SolidWorks to STL中文

Convert SolidWorks (.sldprt / .sldasm) into STL for 3D printing, slicing and rapid prototyping. Done online in WO3D — no SolidWorks license required.

STL is the universal input for slicers and FDM/SLA printers.

Take a SolidWorks part straight to a print without desktop CAD.

No desktop CAD needed — upload your part or assembly in the browser.

When you want to 3D print a SolidWorks part, STL is the format almost every slicer expects.

For engineering exchange use STEP; STL is purely a watertight mesh for manufacturing and printing.

STL approximates curved surfaces with triangles, so finer tessellation means smoother prints.

STL carries no color, units metadata or assembly structure — just geometry.

STL is not editable CAD; keep your SolidWorks file or a STEP export for design changes.

Use STL only at the manufacturing/printing stage.