Do I need CAD software to make an STL?

No. Upload your .igs / .iges file and convert to STL online — no install required.

Is the STL watertight for printing?

Clean IGES surfaces tessellate into a closed mesh; preview before printing to confirm.

STL is a mesh, not CAD. Keep a STEP export if you need further edits.

IGES to STL中文

Convert IGES (.igs / .iges) into STL for 3D printing, slicing and rapid prototyping. Done online in WO3D — no install required.

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

Take IGES geometry straight to a print without desktop CAD.

No CAD software needed — upload IGES in the browser and get STL out.

When you want to 3D print geometry delivered as IGES, 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 IGES surfaces with triangles, so finer tessellation means smoother prints.

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

Clean, closed IGES surfaces yield watertight STL; gappy surfaces may need repair before printing.

Always preview the mesh before slicing.