Format:STL

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Stereolithography File

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File Extension(s): .stl
Type: 3D model (volume/mesh)
Software: e.g. Onshape, Tinkercad, Meshmixer;
export from many others
Machines: 3D printers (upon slicing)
Repositories: check out this list or STLfinder.com

STL was originally the file extension for stereolitography 3D printing models. Today it is also the default format for FDM/FFF 3D printing. Most CAD tools support STL export.

STL files are imported in a slicing software like Cura before printing.

The majority of 3D printing designs are still shared as STL on Thingiverse, but after Makerbot, the company behind Thingiverse, was bought by Stratasys and changed the terms of service, many artists decided to leave Thingiverse and use other STL sharing platforms instead.

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