Print stl

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What is .stl?

Name: Stereolithography
Extension: .stl
Category: 3D
Developer: 3D Systems
Description: Stl is the standard 3D data transmission file format mainly used for 3D printing. STL contains surface geometry descriptions of 3D objects and it uses a series of triangles to describe the surface geometry of a 3D model.
MIME Type: application/vnd.ms-pki.stl
Wikipedia: .stl on Wikipedia

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Last updated October 1, 2026