Which digital file format is widely used to save three-dimensional models for 3D printing? It is the standard format supported by most 3D printers.
STL
STL (STereoLithography, also called Standard Tessellation Language) is the de facto standard file format for 3D printing.
An STL file stores the surface geometry of a 3D object as a mesh of tiny triangles, which slicer software converts into layer-by-layer instructions for the printer.
PDF is for documents, DOCX is Microsoft Word's word-processing format, and XLSX is Microsoft Excel's spreadsheet format, so none of them describe 3D geometry for printing.
Hence, the format widely used to save 3D models for 3D printing is STL.
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